The Michigan Department of Treasury has been made aware that some "Reminder of Tax Due" letters sent to taxpayers contain an incorrect toll-free (1-800) TTY number, which may connect callers to a potential scam. Taxpayers with questions regarding unpaid individual income taxes are asked to contact the Treasury directly at 517-636-4486. We apologize for any confusion or concern this may have caused.
Why am I being charged additional penalty and interest if I filed for an extension?
An extension of time to file is not an extension of time to pay. Penalty and interest will accrue on the unpaid tax from the original due date of the return.