@wmpyoungx
Not sure how you got 2021 TT Form 2210 line 11 to properly credit 2020 over payment, when others are finding it doesn't. I actually didn't have the problem myself, but tested various options with a dummy tax file to try to help others who were. When I enter an over payment for 2020 as credit for 2021 using either step by step or forms in my test file, it shows up in line 6 of Tax Payment Worksheet and reduces my overall tax bill for 2021, but never changes Form 2210 line 11. Net result is that total taxes paid (WH + EST + Carryover) in Tax Payments Worksheet is higher by the amount of carryover than the sum of all 4 periods in Form 2210 line 11, which is the issue that multiple other users are reporting. The only way that I can get line 11 to include the carryover is by entering as extra estimated tax payment(s) (even though the step by step says not to do this) because entering the carryover in the correct section of TT doesn't work. When I look at the IRS instructions for Form 2210, it is clear that IRS expects the 2020 over payment amount to be credited as an estimated tax payment in the appropriate period(s), but 2021 TT isn't doing this for multiple TT Community users. That is why I suggested my tweak to force TT to correctly calculate line 11 by turning the 2020 over payment in to an extra estimated tax payment in the correct period(s) so that TT wouldn't calculate wrong underpayment penalty.
