Wis. Stat. § 71.30

(1) Accounting method.

(a) A corporation shall use a method of accounting authorized under the internal revenue code and shall use the same method used for federal income tax purposes if that method is authorized under the internal revenue code.

(b) A corporation that changes its method of accounting while subject to taxation under this chapter shall make the adjustments required under the internal revenue code, except that in the last year that a corporation is subject to taxation under this chapter it shall take into account all of the remaining adjustments required by this chapter because of a change in method of accounting.

(2) Allocation of gross income, deductions, credits between 2 or more businesses. In any case of 2 or more organizations, trades or businesses (whether or not incorporated, whether or not organized in the United States, whether or not affiliated, and whether or not unitary) owned or controlled directly or indirectly by the same interests, the secretary or his or her delegate may distribute, apportion or allocate gross income, deductions, credits or allowances between or among such organizations, trades or businesses, if he or she determines that such distribution, apportionment or allocation is necessary in order to prevent evasion of taxes or clearly to reflect the income of any of such organizations, trades or businesses. The authority granted under this subsection is in addition to, and not a limitation of or dependent on, the provisions of ss. 71.05 (6) (a) 24. and (b) 45. , 71.26 (2) (a) 7. and 8. , 71.34 (1k) (j) and (k) , 71.45 (2) (a) 16. and 17. , and 71.80 (23) .

(2m) Transactions without economic substance.

(a) If any person, directly or indirectly, engages in a transaction or series of transactions without economic substance to create a loss or to reduce taxable income or to increase credits allowed in determining Wisconsin tax, the department shall determine the amount of a taxpayer’s taxable income or tax so as to reflect what would have been the taxpayer’s taxable income or tax if not for the transaction or transactions without economic substance causing the reduction in taxable income or tax.

(b) A transaction has economic substance only if the transaction is treated as having economic substance as determined under section 7701 (o) of the Internal Revenue Code, except that the tax effect shall be determined using federal, state, local, or foreign taxes, rather than only the federal income tax effect.

(c) With respect to a transaction between members of a controlled group, as defined in section 267 (f) (1) of the Internal Revenue Code, the transaction shall be presumed to lack economic substance, and the taxpayer shall bear the burden of establishing by clear and satisfactory evidence that the transaction or the series of transactions between the taxpayer and one or more members of the controlled group has economic substance.

(3) Computations order. Notwithstanding any other provisions in this chapter, corporations computing liability for the tax under s. 71.23 (1) or (2) shall make computations in the following order:

(a) Tax under s. 71.23 (1) or (2) .

(b) Manufacturing sales tax credit under s. 71.28 (3) .

(bb) Manufacturing investment credit under s. 71.28 (3t) .

(bm) Dairy investment credit under s. 71.28 (3n) .

(bn) Community rehabilitation program credit under s. 71.28 (5k) .

(c) Research credit under s. 71.28 (4) , except as provided under par. (f) .

(cd) Postsecondary education credit under s. 71.28 (5r) .

(ce) Water consumption credit under s. 71.28 (5rm) .

(cn) Biodiesel fuel production credit under s. 71.28 (3h) .

(cs) Low-income housing credit under s. 71.28 (8b) .

(ct) Additional employer-provided child care credit under s. 71.28 (8s) .

(cu) Rail infrastructure modernization credit under s. 71.28 (8t) .

(cv) Rail infrastructure maintenance credit under s. 71.28 (8v) .
nder s. 71.28 (5r) .

(ce) Water consumption credit under s. 71.28 (5rm) .

(cn) Biodiesel fuel production credit under s. 71.28 (3h) .

(cs) Low-income housing credit under s. 71.28 (8b) .

(ct) Additional employer-provided child care credit under s. 71.28 (8s) .

(cu) Rail infrastructure modernization credit under s. 71.28 (8t) .

(cv) Rail infrastructure maintenance credit under s. 71.28 (8v) .

(d) Research facilities credit under s. 71.28 (5) .

(dh) Long-term care insurance assessment credit under s. 71.28 (12) , except as provided under par. (f) .

(dm) Health Insurance Risk-Sharing Plan assessments credit under s. 71.28 (5g) .

(dn) Manufacturing and agriculture credit under s. 71.28 (5n) .

(dp) Veteran employment credit under s. 71.28 (6n) .

(ds) Ethanol and biodiesel fuel pump credit under s. 71.28 (5j) .

(e) Community development finance credit under s. 71.28 (1) .

(ei) Development zone capital investment credit under s. 71.28 (1dm) .

(eL) Development zones credit under s. 71.28 (1dx) .

(ema) Economic development tax credit under s. 71.28 (1dy) .

(eon) Technology zones credit under s. 71.28 (3g) .

(eop) Early stage seed investment credit under s. 71.28 (5b) .

(ep) Supplement to federal historic rehabilitation credit under s. 71.28 (6) .

(epa) Electronic medical records credit under s. 71.28 (5i) .

(epr) Film production company investment credit under s. 71.28 (5h) .

(eps) Film production services credit under s. 71.28 (5f) (b) 1. and 3.

(ey) Employee college savings account contribution credit under s. 71.28 (10) .

(f) The total of farmland preservation credit under subch. IX , enterprise zone jobs credit under s. 71.28 (3w) , electronics and information technology manufacturing zone credit under s. 71.28 (3wm) , long-term care insurance assessment credit under s. 71.28 (12) (d) 2. , business development credit under s. 71.28 (3y) , research credit under s. 71.28 (4) (k) 1. , film production services credit under s. 71.28 (5f) (b) 2. , estimated tax payments under s. 71.29 , taxes withheld under subch. X , taxes withheld under s. 71.775 , and deposits made under s. 71.80 (15) (c) .

(4) Defense contract renegotiation. If the renegotiation or price redetermination of any corporation defense contract or subcontract by the government of the United States or any agency thereof or the voluntary adjustment of prices, costs or profits on any such contract or subcontract results in a reduction of income, the amount of any repayment or credit pursuant to such renegotiation, price redetermination or adjustment, including any federal income taxes credited as a part thereof, shall be allowed as a deduction from the corporate taxable income of the year in which said income was reported for taxation. Any federal income tax previously paid upon any income so repaid or credited shall be disallowed as a deduction from income of the year in which such tax was originally deducted, to the extent that such tax constituted an allowable deduction for said year. Any corporate taxpayer affected by such renegotiation, price redetermination or voluntary adjustment may within one year after the final determination thereof file a claim for refund and secure the same without interest, and the department of revenue shall make appropriate adjustments on account of said tax deductions without interest, notwithstanding the limitations of s. 71.75 or other applicable statutes.