If I'm reading this form's instructions correctly, Turbotax doesn't appear to calculate this line correctly. The instructions for the form state that if you've contributed less than your maximum possible contribution to a Roth IRA in a given year, you should be entering the difference between what you could've contributed and what you did contribute in line 19.
Here's an example. I contributed nothing to a given Roth IRA in 2021. I could've contributed up to $6000 in 2021. The instructions say for line 19: "If you contributed less to your Roth IRAs for 2021 than your contribution limit for Roth IRAs, enter the difference." That means that line 19 should be the difference between those two numbers, which is $6000. Turbotax wants the value for that line to be $0, possibly because it was never actually asked how much I contributed to Roth IRAs last year. I can't edit line 19 in the form. I tried to check the IRA Contributions Worksheet, but there's this line 26 there for Excess Roth IRA contribution credits and no instructions I can discover as to what this credit represents, so I don't know what the result of the worksheet should be.
I'd like to get this line correct (although I'll need to amend returns to correct it now) because I think it should be reducing a previous year's excess contribution via line 19 so I'm not dragging that value along from year to year on this form (shows up on line 18 this year because it's copied from line 24 last year) which is causing me to have a tax penalty every year. If line 19 were $6000 as I think it should be, line 22 would end up being $0 and I would owe no penalty.
