1.
(1)#
For the return under par. (a), the department shall allow an automatic extension of 7 months or until the corresponding due date of the pass-through entity’s federal income tax return or return of partnership income, whichever is later. Except for payments of estimated taxes, and except as provided in subd. 2., withholding taxes payable upon filing the return are not delinquent during the extension period but shall be subject to interest at the rate of 12 percent per year during that period.
(2)#
For taxable years beginning after December 31, 2008, for persons who qualify for a federal extension of time to file under 26 USC 7508A due to a presidentially declared disaster or terroristic or military action, withholding taxes that are otherwise due from a pass-through entity under sub. (2) are not subject to 12 percent interest as otherwise provided under subd. 1. during the extension period and for 30 days after the end of the federal extension period.