Why did it take so long for me to receive a bill?

To ensure that billings are correct, Michigan Department of Treasury attempts to verify that all payments received are properly posted to the correct accounts prior to issuing an assessment/bill.

Note: Taxpayers are responsible for the accurate filing of their return and making sure the correct payment is made timely, no matter who prepares the return.  Any payments received after April 15 (tax year 2020 extended to May 17, 2021) will be considered late and subject to penalty and interest charges.