Whether your public pension is taxable in Michigan depends on your age:
For complete pension deduction information, please see Michigan Income Tax for Retirement Benefits.
TurboTax did my Michigan return, but I was charged tax on my teacher's retirement. this has never happened before. Will TurboTax fix this before the filing deadline? Born before 1946
@tica Make sure you indicated you have a Michigan Public Pension when you enter your 1099-R in your Federal return. You could delete/re-enter your 1099-R to make sure you get the proper follow-up questions.
Click this link for info on How to Enter a 1099-R.
This link has info from Michigan Dept. of Treasury about taxable pensions.