Taxpayers who requested an extension to file their individual income tax returns have through Monday, Oct. 16, to file a complete and accurate return.

Individual income tax returns due under an extension must be received by Treasury on or before Oct. 16, 2023. Returns can be sent through the U.S. Postal Service or e-Filed.

Taxpayers who have yet to file their individual income tax return should consider:

Filing a return to claim an outstanding refund. Taxpayers risk losing their state income tax refund if they don’t file a return within four years from the due date of the original return. Michigan residents can go to www.michigan.gov/mifastfile to learn more about e-filing.

Filing a return to minimize interest and penalties. File returns and pay now to limit interest charges and late payment penalties. An extension of time to file is not an extension of time to pay. Penalty and interest on the tax due is applicable from the original due date of the return until payment is received.

Paying as much tax as possible. If taxpayers owe outstanding taxes and can’t pay in full, they should pay as much as they can when they file their tax returns. Payments can be made using Michigan’s e-Payments service. When mailing checks, carefully follow tax form instructions. Treasury will work with taxpayers who cannot pay the full amount of tax they owe.