Furnishing copy of return filed under internal revenue code; amended return.

Sec. 835. (1) A taxpayer required to file a return under this part 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 tax base under this part. The amended return shall be filed within 180 days after the final determination by the internal revenue service.