Yes, Federal CSRS retirement benefits qualify for the Minnesota subtraction from income, since the related service didn't earn you Social Security benefits.
From this Minnesota DOR webpage:
Payments from these non-Minnesota pension plans may also qualify:
- Any federal government plan based on service for which you did not earn Social Security benefits
**Say "Thanks" by clicking the thumb icon in a post
**Mark the post that answers your question by clicking on "Mark as Best Answer"