With respect to Form 2210 AI line 14 calculations, I can confirm that the calculations for at least columns (a) and (b) are wrong for me. I ran some tests with a spreadsheet and it appears that line 14, box (a) is incorrectly calculating the tax effect of LT cap gains and Qual div. To do the calculation, the actual CG/QD for each period have to be multiplied by the appropriate scaling factor for the period (should be 4 for box (a)). The correct tax calculation would then add 15% of this value to the tax calculated for the total taxable income less the CG/QD income to provide the total tax for that period in box (a). In my case, it appears that TT is incorrectly using the factor for box (b) (factor of 2.4) instead of the correct factor of 4 for box (a) for this calculation. This appears to be a carryover of the 2020 calculation which combined income from the first two periods to assess underpayment penalties. Box (b) also appears to have used the wrong factor (possibly the third period factor of 1.5) which also resulted in a significantly higher number in box 14 (b) than it should if the calculation was done correctly. There may be other explanations for the bad numbers in line 14 (a)- (c), but since previous problems with line 10, box (a) were also the result of carrying over the 2020 Form 2210 calculation, the use of improper scaling factors seems more likely than changing 15% to -12%.
Also I would note that the manual TT update download page/file hasn't been updated for 3 days (since 2/24). This confirms that TT hasn't yet provided the Form 2210 update that was supposed to be issued on 2/25/22 to fix errors in Form 2210 that several of us were told would be issued to allow us to refile our rejected returns
