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Hi- Thanks for the quick response.  I had not visited the Underpayment Penalties questionnaire.  I went to it and the value for 2020 tax liability is -17,652 (prefilled by program).  That was the amount of our refund last year.  I also checked form 2210 and the value for line 6 is -17,652.  I didn't enter that figure manually, rather it was brought over from last years taxes by TT.  Should I just check the 2020 return last year for net amount of taxes paid?  If so where would I find that?