Tax 2.105(4)(a)1.e.e. A decision by the United States tax court or a judgment, decree or other order by a court of competent jurisdiction which has become final, or the date the court approves a voluntary agreement stipulating disposition of the case. A court of competent jurisdiction includes a United States district court, a court of appeals, a court of claims or the United States supreme court. Tax 2.105(4)(a)1.f.f. For combined groups, the “finality of federal adjustments” is determined on the basis of that particular combined group member the adjustments of which ultimately affect the amount of Wisconsin net franchise or income tax or economic development surcharge payable, the amount of a Wisconsin credit, credit carryforward, net business loss, net business loss carryforward, capital loss or capital loss carried forward of the combined group to which that member belongs. Tax 2.105 NoteNote: Decisions of the U.S. tax court and other courts ordinarily become final as follows:
Tax 2.105 Notea. If no appeal is made of a U.S. tax court decision, it becomes final upon expiration of a period of 90 days after the decision is entered. Decisions in unappealable cases involving deficiencies of $50,000 or less heard by the U.S. tax court under section 7463 of the Internal Revenue Code become final 90 days after they are entered. Tax 2.105 Noteb. Appealed decisions of the U.S. tax court become final as set forth in section 7481 of the Internal Revenue Code. Tax 2.105 Notec. A decision of a U.S. district court normally becomes final if not appealed to the U.S. court of appeals within 60 days of the judgment, decree or order.
Tax 2.105 Noted. A decision of the U.S. court of claims or the U.S. court of appeals normally becomes final unless an appeal or a petition for certiorari is filed with the U.S. supreme court within 90 days of the judgment or decree.
Tax 2.105 Notee. A decision of the U.S. supreme court is normally final upon the expiration of a period of 25 days from the date the decision is rendered, if a motion for reconsideration or rehearing is not filed within that time.
Tax 2.105(4)(a)2.2. ‘Information to report to department.’ The taxpayer shall submit to the department a copy of the final federal audit report issued by the internal revenue service together with any other documents or schedules necessary to inform the department of the adjustments as finally determined. The report shall be included with an amended Wisconsin return if a Wisconsin refund is being claimed and may be, but is not required to be, included with an amended return if additional Wisconsin tax or economic development surcharge is due or if there is no change in tax or economic development surcharge. Tax 2.105(4)(a)3.3. ‘Agreement with adjustments.’ A taxpayer shall be deemed to concede the accuracy of the federal adjustments for Wisconsin franchise or income tax or economic development surcharge purposes unless a statement is included with the report to the department stating why the taxpayer believes the adjustments are incorrect. Tax 2.105(4)(b)(b) Amended returns. If a taxpayer files an amended federal tax return and the changes on the amended federal tax return affect the amount of Wisconsin net franchise or income tax or economic development surcharge payable, the amount of a Wisconsin credit or a Wisconsin net operating loss, net business loss or capital loss carried forward, the taxpayer shall file with the department an amended Wisconsin return reflecting the same changes. A taxpayer filing an amended return with another state shall file an amended Wisconsin return if a credit has been allowed against Wisconsin taxes for taxes paid to that state and if the changes affect the amount of Wisconsin net franchise or income tax or economic development surcharge payable, the amount of a Wisconsin credit or a Wisconsin net operating loss, net business loss or capital loss carried forward. If the changes described in this paragraph relate to income, credits claimed or carried forward, net business losses or net business losses carried forward, capital losses or capital losses carried forward, or any other item that is required to be included in a combined report under s. 71.255 (1) (b), Stats., the designated agent of the combined group shall file an amended combined return. Changes to a net operating or business loss carryforward may not be made unless the change to the incurred loss was computed on a return that was filed within 4 years of the unextended due date for filing the original return for the taxable year in which the loss was incurred. Changes to a net operating or business loss carry-back may not be made unless the change to the loss is claimed within 4 years of the unextended due date for filing the original return for the taxable year to which the loss is carried back. The amended Wisconsin return shall be filed within 90 days after the date the amended return is filed with the internal revenue service or other state. Tax 2.105(4)(c)(c) Where and how to submit report or amended return. An amended Wisconsin return or a taxpayer’s report of federal adjustments submitted with an amended Wisconsin return shall be filed in accordance with the provisions of s. Tax 2.12 (5) and (6). A taxpayer’s report of federal adjustments submitted to the department without an amended return shall be identified as reflecting federal adjustments made by the internal revenue service and shall be mailed to Wisconsin Department of Revenue, Audit Bureau, P.O. Box 8906, Madison, WI 53708-8906. The report submitted without an amended return may not be made a part of or attached to any Wisconsin tax return. Tax 2.105(5)(5) Assessments and refunds by department. If a taxpayer reports federal adjustments or files an amended Wisconsin return with the department within 90 days after the adjustments become final or after an amended return is filed with the internal revenue service or another state, the department may make an assessment or issue a refund relating to the report or amended return as follows: Tax 2.105(5)(a)(a) Assessments. Under s. 71.77 (2), Stats., the department may make an assessment within 4 years from the date the original Wisconsin franchise or income tax return was filed. However, under s. 71.77 (7) (a), Stats., if the taxpayer reported less than 75% of the correct net income and the additional tax for the year exceeds $200 for a joint return, or $100 for a return other than a joint return, an assessment may be made within 6 years after the return was filed. If an assessment relates to a federal adjustment that affects a combined report, the department may issue such assessment to either the corporation whose income was adjusted for federal purposes or to the designated agent of the combined group, or both. Tax 2.105 NoteNote: See s. Tax 2.67 (4) for rules relating to the statute of limitations as applied to combined returns. Tax 2.105(5)(b)(b) Refunds. Under s. 71.75 (2), Stats., the department may issue a refund if an amended return is filed within 4 years of the unextended date the original Wisconsin franchise or income tax return was due. Tax 2.105(5)(c)1.1. An assessment may be made later than the 4- and 6-year periods provided in par. (a) if notice of the assessment is given to the taxpayer within 90 days of the date the department receives a timely report of federal adjustments or an amended Wisconsin return. However, the assessment made after the expiration of the 4- and 6-year periods shall only relate to those federal adjustments or the changes on the amended Wisconsin return. Tax 2.105(5)(c)2.2. If a taxpayer reports federal adjustments to the department after the expiration of the 4-year period for filing an amended Wisconsin return as described in par. (b), a refund based upon federal adjustments reducing the taxpayer’s federal tax liability, which are applicable to the taxpayer’s Wisconsin tax or economic development surcharge liability, may still be made if notice of the refund is given to the taxpayer within 90 days of the date the department received a timely report of the federal adjustments. Tax 2.105(5)(c)3.3. The 90-day period for the department’s giving notice of an assessment or issuing a refund may be extended if a written agreement is entered into by the department and the taxpayer prior to the expiration of the 90 days. Tax 2.105(5)(c)4.4. If federal adjustments or changes on an amended return filed with the internal revenue service or another state pertain to a year which has been previously field audited by the department and the field audit has been finalized, an assessment or refund nevertheless may be made. However, the assessment or refund shall only relate to those federal adjustments or the changes on the amended return. Notice of the assessment or refund shall be given to the taxpayer within 90 days of the date the department received the report of federal adjustments or an amended Wisconsin return from the taxpayer. Tax 2.105 NoteExamples: 1) Federal adjustments were made to an individual’s 2013 calendar- year basis federal income tax return; the adjustments became final on June 1, 2018. On August 15, 2018, within 90 days after the adjustments became final, the department received the taxpayer’s report of the adjustments. Although the 4-year period provided by s. 71.77 (2), Stats., for making adjustments to the 2013 Wisconsin return expired on April 15, 2018, the department had until November 13, 2018, 90 days after the date the department received a report of the adjustments, to give notice of an assessment to the taxpayer. Tax 2.105 Note2) An individual filed an amended 2015 calendar-year basis New York return on June 1, 2016. An amended Wisconsin return, reflecting the changes on the amended New York return, was filed with the department on July 12, 2016. Under the 4-year assessment period in s. 71.77 (2), Stats., the department has 4 years from April 15, 2016, the due date of the 2015 return, in which to notify the taxpayer of any assessment relating to the changes on the amended New York return. Tax 2.105(6)(6) Taxpayer’s failure to report federal adjustments or file amended Wisconsin return; adjustments and amended returns relating to taxable year 1987 and thereafter. If a taxpayer fails to report federal adjustments or the filing of an amended federal or other state return, relating to the taxable year 1987 and thereafter, within the 90-day period described in sub. (3) (b), the department may assess additional Wisconsin franchise or income tax or economic development surcharge relating to the adjustments or amended return within 4 years after discovery by the department. Tax 2.105 NoteExample: An individual taxpayer filed a 2015 calendar-year basis Wisconsin income tax return on April 15, 2016. The internal revenue service made adjustments to the 2015 federal income tax return which the taxpayer did not report to the department within 90 days after the adjustments became final. The internal revenue service reports these adjustments to the department under the exchange of information agreement between the two agencies on May 1, 2018. The department may issue an assessment for the adjustments any time on or before May 1, 2022.
Tax 2.105 NoteNote: Section 71.76, 1989 Stats., was amended by 1991 Wis. Act 39, effective for federal changes or corrections to a federal income tax return that became final on or after August 15, 1991, and for amended federal and other state returns filed on or after August 15, 1991. Under the statute in effect immediately prior to the enactment of 1991 Wis. Act 39, a taxpayer was required to report internal revenue service adjustments to taxable income that affected the income reportable or tax payable to Wisconsin, and to file an amended Wisconsin return if information contained on an amended federal or other state tax return affected income reportable or tax payable to Wisconsin. Tax 2.105 HistoryHistory: Cr. Register, January, 1979, No. 277, eff. 2-1-79; correction in (3) (a) 1. a. made under s. 13.93 (2m) (b) 4., Stats., Register, July, 1987, No. 379; r. (2), (4) and (5) (d); renum. (1), (3), (5) (a) to (c) and (6) to be (2), (4), (6) and (7) and am. (2), (4) (a) 1.b., c. and e, (b), (6) (a) to (c) and (7), cr. (1), (3) and (5), Register, February, 1990, No. 410, eff. 3-1-90; r. and recr. Register, May, 1996, No. 485, eff. 6-1-96; CR 10-095: am. (1), (2), (3), (4) (a) (intro.), 2., 3., (b), (5) (a), (c) 2., (6) (a), cr. (4) (a) 1. f. Register November 2010 No. 659, eff. 12-1-10; CR 12-011: am. (1), (3) (a), (b), (4) (a) (intro.), 1. f., 2., 3., (b), (5) (c) 2., (6) (a) Register July 2012 No. 679, eff. 8-1-12; CR 19-141: am. (4) (b) Register September 2020 No. 777, eff. 10-1-20; CR 21-085: am. (5) (c) 4. (Examples), (6) (a) (Example), r. (6) (b) Register August 2022 No. 800, eff. 9-1-22; renum. (6) (a) to (6) under s. 13.92 (4) (b) 1., Stats., Register August 2022 No. 800. Tax 2.11Tax 2.11 Credit for sales and use tax paid on fuel and electricity. Tax 2.11(1)(a)(a) Fuel and electricity “consumed in manufacturing” means only fuel and electricity used to operate machines and equipment used directly in the step-by-step manufacturing process. Fuel and electricity are not “consumed in manufacturing” if they are used in providing plant heating, cooling, air conditioning, communications, lighting, safety and fire prevention, research and product development, receiving, storage, sales, distribution, warehousing, shipping, advertising or administrative department activities. However, fuel and electricity used directly in manufacturing steam which is used by the manufacturer in further manufacturing or in heating a facility, or both, is consumed in manufacturing. Tax 2.11(2)(a)(a) Under s. 71.28 (3), Stats., a corporation may reduce its income or franchise tax liability for the year by an amount equal to the Wisconsin state and county sales and use taxes it has paid on fuel and electricity consumed in manufacturing personal property within Wisconsin. Tax 2.11(2)(b)(b) If separate gas or electric meters are not used to accurately measure the fuel and electricity consumed in manufacturing in Wisconsin, a reasonable allocation is necessary. Tax 2.11(2)(c)(c) The credit is allowable for all Wisconsin and Wisconsin county sales and use taxes paid during the taxable year on fuel or electricity destined for manufacturing purposes, regardless of when the fuel or electricity was or is to be consumed. Tax 2.11 NoteNote: Refer to Streets and Roads Construction Corporation v. Wisconsin Department of Revenue, Wisconsin Tax Appeals Commission, Docket No. I-6239, July 28, 1981, and Fort Howard Paper Company v. Wisconsin Department of Revenue, Wisconsin Tax Appeals Commission, Docket No. I-8266, November 1, 1983.
Tax 2.11(3)(a)(a) If a corporation is entitled to a sales and use tax credit under s. 71.28 (3), Stats., the credit, to the extent not offset by the tax liability of the same year, may be offset against the tax liability of the subsequent year and each succeeding year up to a total of 15 years until the credit has been completely offset. Tax 2.11 NoteNote: The carry forward of the sales tax credit was increased from 5 to 15 years by 1985 Wis. Act 29, and the 15 year carry forward first applies to credits carried forward from the 1980 taxable year. Tax 2.11(3)(b)(b) The sales tax credit shall first be offset against the income or franchise tax liability computed for the tax year before an unused credit from a prior year may be applied. Tax 2.11(4)(4) Credit includable in net income. Under s. 71.26 (2), Stats., the credit computed for sales and use taxes paid on fuel and electricity consumed in manufacturing under s. 71.28 (3), Stats., shall be included in net income for the tax year. Except for tax-option corporations, the entire credit computed for the tax year is includable in net income, even though the credit is not entirely used or no income or franchise tax liability exists. Under s. 71.34 (1k) (e), Stats., tax-option corporations shall only include in net income the amount of credit computed under s. 71.28 (3), Stats., and used to offset the income or franchise tax liability of the current year. Tax 2.11 HistoryHistory: Cr. Register, February, 1978, No. 266, eff. 3-1-78; am. (2) (a) r. (1) (d), (2) (b) and (3) (a), renum. (3) (b) and (c) to be (3) (a) and (b), cr. (4), Register, September, 1983, No. 333, eff. 10-1-83; am. (1) (intro.) and (3), renum. (1) (a) to (c) to be (1) (d), (b) and (a) and am., cr. (1) (c), r. and recr. (2) and (4), Register, February, 1990, No. 410, eff. 3-1-90; corrections in (1) (b) and (4) made under s. 13.92 (4) (b) 7., Stats., Register April 2010 No. 652. Tax 2.12Tax 2.12 Claims for refund and other amended returns. Tax 2.12(1)(1) Scope. This section applies to amended Wisconsin franchise or income tax returns, including amended combined returns, amended partnership returns, amended economic development surcharge returns and amended farmland preservation credit and homestead credit claims. Tax 2.12(2)(a)(a) “Claim for refund” means an amended Wisconsin return or credit claim as described in sub. (1), on which a refund is requested. Tax 2.12(2)(b)(b) “Timely filed,” in the case of an amended return or credit claim, means either of the following: Tax 2.12(2)(b)1.1. If the amended return or credit claim is mailed, it is mailed in a properly addressed envelope with postage prepaid and is received by the department, or is received at the destination that the department or the department of administration prescribes, within 5 business days after the last day of the statutory limitation period or extended limitation period. Tax 2.12(2)(b)2.2. If the amended return or credit claim is not mailed, it is in the possession of the department, or is received at the destination that the department or the department of administration prescribes, prior to the expiration of the statutory limitation period or extended limitation period. Tax 2.12(3)(a)(a) The department shall accept amended returns and credit claims to correct previously filed original, other amended or adjusted Wisconsin franchise or income tax returns, partnership returns, economic development surcharge returns or farmland preservation credit or homestead credit claims. Tax 2.12(3)(b)(b) A refund of taxes or credits under ch. 71, Stats., or economic development surcharge under s. 77.96 (4), Stats., may be claimed only by filing an amended return or credit claim, on a form and in the manner described in subs. (5) and (6). Tax 2.12(3)(c)(c) An amended Wisconsin return shall be filed with the department if either an amended federal return is filed or an amended return is filed with another state for which a credit for taxes has been allowed against Wisconsin taxes, and the changes to the amended federal or other state return affect the amount of Wisconsin net franchise or income tax or economic development surcharge payable, a Wisconsin credit or a Wisconsin net operating loss, net business loss or capital loss carried forward. Changes to a net operating or business loss carryforward may not be made unless the change to the incurred loss was computed on a return that was filed within 4 years of the unextended due date for filing the original return for the taxable year in which the loss was incurred. Changes to a net operating or business loss carry-back may not be made unless the change to the loss is claimed within 4 years of the unextended due date for filing the original return for the taxable year to which the loss is carried back. Tax 2.12(3)(d)(d) An amended Wisconsin return filed to report internal revenue service adjustments as provided in s. Tax 2.105 (4) (a) shall include a copy of the final federal audit report. Tax 2.12(3)(e)(e) An amended return or credit claim does not begin or extend the statute of limitation periods for assessing additional tax or economic development surcharge or claiming a refund. Tax 2.12(4)(a)(a) Except as provided in par. (b), if an amended return or credit claim shows a refund, it shall be filed within 4 years of the unextended due date of the original return. Tax 2.12(4)(b)(b) The 4-year filing limitation in par. (a) does not apply in the following situations: Tax 2.12(4)(b)1.1. Except as provided in subds. 3. and 4., a claim for refund may not be filed for any year covered by a field audit that resulted in a refund or no change in the tax owed, or in an assessment that has become final under s. 71.88 (1) (a) or (2) (a), 71.89 (2), 73.01 or 73.015, Stats., provided the department advises the taxpayer that the field audit is final unless the taxpayer appeals the result. Tax 2.12(4)(b)2.2. Except as provided in subds. 3. and 4., a claim for refund may not be filed for any item of income or deduction assessed as a result of an office audit, provided the assessment has become final under s. 71.88 (1) (a) or (2) (a), 71.89 (2), 73.01 or 73.015, Stats. Section 71.88 (1) (a), Stats., provides that a taxpayer may file a petition for redetermination within 60 days of receipt of a notice of additional assessment, refund or denial of refund. If a taxpayer does not file a petition for redetermination of a notice of assessment, refund or refund denial, the adjustments made in the notice are final and conclusive. The taxpayer is not entitled to a refund on any subsequent claim for refund based on the same adjustments as those in the notice of assessment, refund or denial of refund. Tax 2.12 NoteExamples: 1) Taxpayer A files an amended 2016 return to claim additional business expenses. The department allows only a portion of the claimed additional expenses, based on a difference in interpretation of the law. A notice of refund is issued March 1, 2019. The taxpayer does not file a petition for redetermination. In December 2019, the taxpayer files another amended return claiming the same additional business deductions as those disallowed in the prior notice of refund. The taxpayer is not entitled to a refund on the claim for refund. The March 1, 2019, notice of refund is final.
Tax 2.12 Note2) Taxpayer B files an amended 2016 return to claim additional business expenses. The department disallows a portion of the claimed additional expenses, due to lack of substantiation of the expenses as requested in a letter to the taxpayer. A notice of refund is issued March 1, 2019. The taxpayer does not file a petition for redetermination. In December 2019, the taxpayer submits adequate substantiation to support the full deduction. The deduction is not allowed and no additional refund will be issued. Since no petition for redetermination was filed for the March 1, 2019, notice of refund, that notice is final.
Tax 2.12 Note3) Taxpayer C files a timely 2017 return claiming a refund of earned income credit and excess income tax withheld. During the processing of the return the taxpayer is sent a letter requesting additional information to substantiate the earned income credit. The taxpayer does not respond to the request for additional information. A notice of refund is issued in July 2018, to refund the excess income tax withheld only. The taxpayer does not file a petition for redetermination. The taxpayer files a timely 2018 return claiming a refund of earned income credit and excess income tax withheld. During the processing of this return the taxpayer is sent a letter requesting additional information to substantiate the earned income credit. This letter requests the same information that was requested for the processing of the 2017 return. The taxpayer submits the additional information needed for both the 2017 and 2018 returns. Since the taxpayer did not submit a petition for redetermination for the 2017 notice of refund, that notice is final. A notice of refund for the earned income credit is issued for 2018 only.
Tax 2.12(4)(b)3.a.a. For taxable years beginning on or after January 1, 2000, a claim for refund for each year for which an amount due is calculated as a result of items adjusted in an office audit or field audit assessment or refund may be filed within 4 years of the date of the adjustment notice, provided no petition for redetermination was filed and, if the adjustment notice was an assessment, the amount due was paid. No refund claim may be filed under this subd. 3. a. for any year that resulted in a refund or no change in the amount owed. Tax 2.12 NoteExamples: 1) Taxpayer D files a timely 2015 return. The department completes an office audit of this return by issuing a notice of refund dated March 30, 2020. The notice of refund allows an additional itemized deduction credit and disallows a portion of the claimed business expenses. The taxpayer does not file a petition for redetermination. The notice of refund is final, and the taxpayer is not entitled to any refund on a subsequent claim for refund for the disallowed business expenses.
Tax 2.12 Note2) Taxpayer E files timely 2015 and 2016 returns. The department completes an audit of the returns and issues a notice of refund dated March 30, 2020. The notice of refund allows an additional itemized deduction credit for each year but also disallows a portion of the claimed business expenses for each year, with the net result being a refund for each year. The taxpayer does not file a petition for redetermination. The notice of refund is final, and the taxpayer is not entitled to any refund on a subsequent claim for refund for the disallowed business expenses.
Tax 2.12 Note3) Taxpayer F files a timely 2010 return on April 15, 2011. The department completes an office audit of this return by issuing a notice of additional tax due dated March 30, 2015. The notice of additional tax due allows an additional itemized deduction credit and disallows a portion of the claimed business expenses. The taxpayer does not file a petition for redetermination. The taxpayer has until March 30, 2019, to file a claim for refund for the disallowed business expenses.
Tax 2.12 Note4) Taxpayer G files timely 2010 and 2011 returns. The department completes an office audit of these returns by issuing a notice of refund dated March 30, 2015. The notice of refund allows an additional itemized deduction credit resulting in a refund for 2010 and disallows a portion of the claimed business expenses for an assessment for 2011, with the net result being a refund for the two years combined. The taxpayer does not file a petition for redetermination. The taxpayer has until March 30, 2019, to file a claim for refund for the disallowed business expenses for the year 2011.
Tax 2.12 Note5) Taxpayer H files timely 2010 and 2011 returns. The department completes an office audit of these returns by issuing a notice of additional tax due dated March 30, 2015. The notice of additional tax due allows an additional itemized deduction credit resulting in a refund for 2010 and disallows a portion of the claimed business expenses resulting in an assessment for 2011, with the net result being an assessment for the two years combined. The taxpayer does not file a petition for redetermination. The taxpayer has until March 30, 2019, to file a claim for refund for the disallowed business expenses for the year 2011.
Tax 2.12(4)(b)3.b.b. For taxable years beginning prior to January 1, 2000, a claim for refund for each year for which an amount due is calculated as a result of items adjusted in an office audit or field audit net assessment may be filed within 2 years of the date of the assessment notice, provided no petition for redetermination was filed and the amount due was paid. No refund claim may be filed under this subd. 3. b. for any year that resulted in a refund or no change in the amount owed or, in the case of a multiple year audit resulting in a net refund, for any year for which an amount due is calculated. Tax 2.12 NoteExamples: 1) Taxpayer I files a timely 1999 return on April 15, 2000. The department completes an office audit of this return by issuing a notice of refund dated March 30, 2004. The notice of refund allows an additional itemized deduction credit and disallows a portion of the claimed business expenses. The taxpayer does not file a petition for redetermination. The notice of refund is final, and the taxpayer is not entitled to any refund on a subsequent claim for refund for the disallowed business expenses.
Tax 2.12 Note2) Taxpayer J files timely 1998 and 1999 returns. The department completes an office audit of these returns by issuing a notice of refund dated March 30, 2003. The notice of refund allows an additional itemized deduction credit resulting in a refund for 1998 and disallows a portion of the claimed business expenses for an assessment for 1999, with the net result being a refund for the two years combined. The taxpayer does not file a petition for redetermination. The notice of refund is final, and the taxpayer is not entitled to any refund on a subsequent claim for refund for 1998 or 1999.
Tax 2.12(4)(b)4.4. A claim for refund of an overpayment attributable to a capital loss carryback may be filed by a corporation, or designated agent of a combined group, within 4 years after the due date, or extended due date, for filing the return for the taxable year of the capital loss that is carried back. Tax 2.12 NoteNote: For combined groups, see s. Tax 2.61 (6) (c) for rules applicable to capital gains and losses. Tax 2.12(4)(b)5.5. If the limitation period for making an assessment or refund has been extended by written agreement between a taxpayer and the department, a claim for refund relating to the year or years covered by the extension agreement may be filed during the extension period. Tax 2.12 NoteNote: For combined groups, refer to s. Tax 2.65 for rules applicable to the designated agent of a combined group. Tax 2.12(4)(b)6.6. An amended Wisconsin return filed under the provisions of sub. (3) (c) shall be filed with the department within 90 days after the date the amended federal or other state return is filed. Tax 2.12(4)(b)7.7. An amended Wisconsin return filed under the provisions of sub. (3) (d) shall be filed with the department within 90 days of the date on which the federal audit adjustments become final. Tax 2.12(4)(b)8.8. An amended Wisconsin return filed under the provisions of s. 71.30 (4), Stats., to claim a reduction of income resulting from a renegotiation or price redetermination of a defense contract or subcontract shall be filed within one year of the final determination. Tax 2.12 NoteNote: Refer to s. Tax 2.105 for additional information regarding amended Wisconsin returns required as a result of filing amended federal or other state returns, or reports required as a result of federal audit adjustments made by the internal revenue service. Tax 2.12(5)(a)(a) Beginning on or after January 1, 2015, except as provided in par. (c), a claim for refund shall be filed on the same form as the original form, in the manner prescribed in sub. (6). Tax 2.12(5)(c)(c) The department may prescribe a special form for taxpayers to use in claiming a refund, to address a specific tax issue. In this situation, the special form may be used in lieu of the amended form prescribed in par. (a). Tax 2.12 NoteExample: Wisconsin form 1X-R was developed in 1993 to address the issue of the flow-through of interest exempt from Wisconsin taxes received from a qualified retirement plan.
