MN | The Minnesota Department of Revenue reminds S Corporations that they must file Form M8, S Corporation Return and pay the tax owed by the due date for filing their federal return. Generally, this is March 15 of the following year. If you file on a fiscal year basis, it’s the 15th day of the third month following your tax year.
The filing date is the U.S. postmark date, or the date recorded or marked by a designated delivery service. Postage meter marks are not valid. When a return is considered late, the date it is received at the Minnesota Department of Revenue is treated as the date filed.