Wisconsin Statutes Taxation (Ch. 70 to 79) § 71.16. Allocation of modifications

(1) A modification or portion thereof which relates to an item of income, gain, loss or deduction which affects the computation of the federal distributable net income of the estate or trust for the current year shall be apportioned among and taken into account by the fiduciary and the beneficiary or beneficiaries in the same proportion that the item to which it relates is considered as distributed among them for federal income tax purposes.

(2) Any remaining modifications or portions thereof shall be taken into account by the fiduciary.

(3) If an additional assessment is made against the fiduciary or any beneficiary as a result of correction of an erroneous allocation of the modifications applicable to the income of an estate or trust, any overpayment resulting from consistent application of such correction to all other taxpayers interested in such estate or trust shall be refunded notwithstanding any rule of law which would otherwise bar such refund.