Thanks for your reply. Yes, I have done that calculation manually with and without the IRA deduction subtracted, and in every case the number I come up with is QUITE different than what TurboTax is coming up with (my number is quite a bit higher). I cannot figure out how that calculation is being done by TT behind the scenes, as it seems much too low. When I right-click on "data source" for that number in the worksheet, the popup says:
"However, if the taxpayer or the spouse also received a distribution from a traditional IRA, a special calculation is made to determine the amount on this line and may not agree with the amount on line 38 [line 11] of Form 1040"
This is exactly my situation, as I also have received a distribution from a traditional IRA while I am also trying to contribute to the IRA for 2021. So I am wondering what "special calculation" is made, as it is not shown anywhere in TT and it is clearly NOT the calculation described in Appendix C, with or without the IRA contribution deduction.
It seems to me that this might be a bug in TT because the number it comes up with is MUCH lower than the number I come up with by following the instructions for the Pub 590-A calculation. [Note that where the popup references line 38 of Form 1040, it obviously means line 11 of the 2021 Form 1040.]
