In forms view, there was "Blank Form" which contained my explanation of my IRA Basis Change. Since this is a Turbotax issue and not a real basis change, it should not go to the IRS. Since I could not again get to the explanation in Step-by-Step, I deleted all the fields in the form. I no longer see the Blank Form.
In Turbotax 2020, My IRA Info Wks contains the following:
Part 1 Line 1, Total basis in traditional IRAs = 3,077
Part 1 Line 3, Basis carryover as of 12/31/2020 = 1,792
Part 3 Line 12, Basis for 2019 and earlier years = 3,077
Part 3 Line 17, Adjusted total basis in Traditional IRAs = 3,077
All other lines are blank. Certainly looks like a bug in TT 2020 reduced my basis by the 1,285 charitable distribution I made from my IRA. Even if the 1,285 were not a charitable contribution, my basis would only have been reduced by a fraction of that amount.
It is only because I do my taxes both with Turbotax and a personally created spreadsheet that I noticed this discrepancy. Other folks in my same situation may well overpay their taxes.
