You'll record car registration fees on Federal Schedule A - which is outside of Minnesota-specific material that would be recorded/requested during the state return.
If Minnesota has specific guidelines for what to include on your federal return, you would ultimately refer to the guidance of your state's department of revenue. TurboTax provides you the space to enter a value - what that value is must be determined by you: http://www.revenue.state.mn.us/individuals/individ_income/Pages/Deducting_Vehicle_License_Fees.aspx
