As I have noted in several other forums, a simple workaround to get 2021 TT to properly calculate the effect of capital gains in the first three periods for Form 2210 and 2210AI is to simply report the total of the capital gains and qualified dividends in each of the first three periods as qualified dividends and enter zero for capital gains in each of these periods. Since TT scales the value in the qualified dividends entry for each period, this will result in TT correctly calculating the effect of capital gains and qualified dividends per IRS instructions and result in a proper underpayment penalty calculation for each period. The IRS accepted an e-filed return with this workaround. Note that since scaling factor for the full year is 1, the fact that TT actually shows the capital gains as capital gain entry for the fourth period has no impact on Form 2210 calculations. Using this workaround will allow you to e-file Federal return, rather than having to mail in forms (the IRS is way behind in processing mailed returns from multiple years, so they would much prefer that you e-file).
