No, as I said, it is not prepayment (i.e., a "credit"). It is a deduction based on some large fraction of the dollar-amount of the ES#4.
And yes, accountant said it does matter for tax year 2021 and it should be carried forward to this year but it just so happens that it will not help this year (because of the $10,000 limit). And it only carries forward for one year so there are no tax consequences when TT will not let me enter it.
This may be my first and last year with TT. We are a simple scenario (only W-2s and 1099s) but the "questionnaire-based" approach is really inflexible -- and you can not even tell that you took an exit ramp. And the number of issues that can not be resolved -- this, entering prior Form 8606 data, interpreting foreign tax credit, and a few others -- does not inspire confidence.
