I also noted that the step by step page in the underpayment penalty section for entering withholding information for each period is messed up for the second and third periods. Both of these should specify 6/15/21 rather than 7/15/21 so that the withholding data matches the income periods that are use in Form 2210 series. This would affect the penalty calculation, but in taxpayer's favor, if the data through 7/15/21 was entered. Still no update this morning to correct the error with Form 2210 line 10 box (a) and I haven't found any workarounds that will override the incorrect number without causing other problems with the Form 2210 series calculations.
