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The Michigan Department of Treasury does not require that you file for an extension of time to file your state tax return if you are filing for a federal extension. Michigan will grant an automatic six-month extension of time to file until October 15, 2015 with a federal extension.
The taxpayer must file an amended 1983 Michigan income tax return by June 4, 1988 to receive a refund based on the Federal audit changes. Example 2: On January 15, 1987, a determination of Taxpayer D's 1985 Federal income tax return was issued showing overstated business income.