Whoever or whatever software you are using to e-file your MI state return with will have you sign/esign the form MI-8453. The form MI-8453 is an e-file only form and is only used if e-filing the MI state return without e-filing your linked federal return.
TurboTax does not allow you to e-file a state return without the federal return. If you are filing your MI return separately you will need to print/mail your state return if using TurboTax. The form MI-8453 is not needed in that case.
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