Section 208.1507 - [Repealed 12/31/2031] Return; Filing; True and Correct Copy; Amended Return(1) A taxpayer required to file a return under this act may be required to furnish a true and correct copy of any return or portion of any return filed under the provisions of the internal revenue code.(2) A taxpayer shall file an amended return with the department showing any alteration in or modification of a federal income tax return that affects its business income tax base or modified gross receipts tax base under this act. The amended return shall be filed within 120 days after the final determination by the internal revenue service.Repealed by 2019, Act 90,s 7, eff. 12/31/2031.Repealed by 2011, Act 39,s 7, eff. on the date that the secretary of state receives a written notice from the department of treasury that the last certificated credit or any carryforward from that certificated credit has been claimed.Added by 2007, Act 36,s 60, eff. 1/1/2008.Repealed effective 12/31/2031 -- Enacting section 1 of 2019, Act 90 provides: "The Michigan business tax act, 2007 PA 36, MCL 208.1101 to 208.1601, is repealed effective for tax years that begin after December 31, 2031."Contingent repeal -- See Enacting section 1 of 2011, Act 39,s 7