If you owe tax: Payments can be made using Michigan’s e-Payments service by direct debit (e-Check) from your checking or saving account, or by using a credit or debit card. Visit www.michigan.gov/iit to make your payment electronically.
Payments can also be mailed. Make your check payable to "State of Michigan." Print the last four digits of your Social Security number and "2018 income tax" on the front of your check. If paying on behalf of another taxpayer, write the filer’s name and the last four digits of the filer’s Social Security number on the check. Enclose your payment but do not staple it to the return.
The filing deadline to receive a refund for tax year 2018 is April 15, 2023.