I too have the same problem. I overpaid estimated taxes get it computes an underpayment penalty of $2. I'm fine with that as long as it doesn't use the Annualized Income Installment Worksheet.
I checked the M15 form and see that it has the wrong data for Line21 (my first estimated tax payment is not there).
Do you know if M15 can be edited manually? I tried to but was unsuccessful.
I obviously don't have a solution. Hopefully adding more information to your question can help someone troubleshoot this problem.
