An extension is a request for more time to file your Michigan tax return. It is only an extension of time to file, not an extension of time to pay.Mail Form 4868 in time to be postmarked no later than April 15, 2024. Make check payable to "State of Michigan. " Print "Michigan Extension" and last four digits of filer,s Social Security number or full account number on the. Filing an extension on time will ONLY eliminate the late filing penalties but not the late tax payment penalties. You only need to file a Michigan state extension if you expect to owe taxes to the state of Michigan. To apply for a Michigan personal extension, you must file Michigan Form 4 or a copy of your valid Federal tax extension (IRS Form 4868). If you have an approved 6-month Federal extension (IRS Form 4868), you will automatically receive a Michigan tax extension for the same amount of time. Corporation An extension of time to file the federal return automatically extends time to file the Michigan return.