Adjustment of credits.
(a)#
If an audit of a claim for a credit under s. 71.07, 71.28 or 71.47 or subch. VIII or IX indicates that an incorrect claim was filed, the department shall make a determination of the correct amount and notify the claimant of the determination and the reasons therefor under sub. (11) within 4 years of the last day prescribed by law for filing the claim. If the claim has been paid, or credited against income or franchise taxes otherwise payable, the credit shall be reduced or canceled, and the proper portion of any amount paid shall be similarly recovered by assessment as income or franchise taxes are assessed.