Latest TT update on 2/24/22 has fixed the error with Form 2210 line 10 box (a). Line 10 now matches Form 2210AI line 27. This has eliminated the bogus underpayment that TT previously calculated. However, the step by step page for entering annualized withholding still shows incorrect date (7/15/2021) in second and third periods: should be 6/15/2021.
