Unfortunately, TT is currently using the 2020 Form 2210 programming methodology, which is significantly different than 2021 because IRS extended the due date for the first 2020 estimated tax payment from April 15 to July 15, 2020 because of COVID issues, until it reprograms Form 2210 based on the 2021 version which IRS released to the public about a month ago on January 12.
Form 2210 is required to be filed in some situations, if the underpayment of estimated tax penalty can be reduced or eliminated if you are using the:
Annualized Income Installment Method (e.g., you realized significant capital gain or other income in the latter part of 2021), or
actual withholding method, by treating tax withheld from income during 2021 as paid on dates actually withheld (e.g., you received a significant bonus from which tax was withheld from your employer in the first quarter of 2021), or another reason.
In these cases, it is best to delay finalizing your 2021 return until TT finishes programing the updated 2021 Form 2210.
