Beginning with tax year 2017, if you need to make a correction to your return, file a new complete MI-1040. Check the Amended Return box at the top of page 1 of the form, and file the Schedule AMD and all applicable schedules and supporting documentation to amend your return. If you are due a refund on your amended return, you must file it within four years of the due date of the original return.
Once you file a joint return, you cannot choose to file separate returns for that year after the due date of the return. If a change on your federal return affects Michigan taxable income, you must file an amended return within 120 days of the change. You must include a copy of your amended federal return and all supporting schedules. Include payment of any tax and interest due.
To amend only a homestead property tax or home heating credit, file a new MI-1040CR, MI-1040CR-2, or MI-1040CR-7 respectively, for the appropriate year. Check the Amended Return box on the top of page 1 of each credit claim; do not file a new MI-1040 or Schedule AMD. If applicable, include a copy of your property tax statement(s), and/or lease agreement and a copy of your heat statement