If your state tax return was already accepted by the state, just like you have done already you can track it at the Michigan Department of Treasury Where's My Refund? page.
Make sure that you are using the correct information when looking it up, the state of Michigan, unlike other states, it asks for the adjusted gross income (AGI). The AGI or THR can be found on your Individual Income Tax Return MI-1040.
You can also contact the Michigan Department of Treasury.
