"• Recipients born before 1946 may subtract all qualifying retirement and pension benefits received from federal or Michigan public sources, and may subtract qualifying private retirement and pension benefits up to $51,570 if single or married filing separate, or $103,140 if married filing a joint return. If your public retirement benefits are greater than the maximum amount you are not entitled to claim an additional subtraction for private pensions."
So if you have told TurboTax that you were born before 1946 and you identified this pension as a private pension, the subtraction should happen automatically.
Do TurboTax not do this?
Look at line 12 on the MI 4884. Note that public and government pensions for such taxpayers have no limit and appear on line 10.
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