There is up to $600 of deduction (married filing jointly) that is not captured on line 7 of the Schedule AI worksheet that should be pulled from line 12b of form 1040 (or 1040-SR). So the net income to be taxed is incorrect in all four columns at line 11 and beyond, when analyzing underpayment penalty.
Interestingly enough, in column d on the worksheet, my end of year income shown on line 13 differs by $600 from the amount on 1040 line 15, yet TT computes the same tax owed. Obviously something else is wrong.
At least the penalty part went away, but the form still has issues.
