I had the same issue. But since I couldn't uncheck the box and going back didn't help, I tried going forward. Here are my responses.
- Are line 2h, lines 2k through 2t, and line 3 of your 2019 federal Form 6251 blank? I responded with Yes
- 2019 Federal Adjusted Gross Income (from 2019 Federal Form 1040, line 8a) On the 2019 form 1040 the AGI was on line 8b so I entered that amount
- Prior Year Credit Carryover I responded with zero
The system responded "Based on your entries, you don't have a Minnesota Alternative Minimum Tax Credit for 2020"
A couple of extra notes. First, I made sure that my MN Refund number at the top of the screen didn't change during this. If it had changed, then I would be concerned. Second, when I print and file my MN return, I plan to remove the Form M1MTC (if it prints) before I put it in the mail.
Hope that helps.
