You may just need to wait for an update. Turbotax handled this properly on 2021 returns (I just tested it to be sure). I also just tried a test on the 2022 software (download Deluxe) and, as happened to you, it is not working properly.
I'll notify TT of the problem.
Q. How do I enter my 1098-T information so that TurboTax counts my stipend income toward a Roth IRA contribution?
A. Normally, all you have to do is check the grad school box at the 1098-T screen and indicate you have taxable scholarship going on line 1 of form 1040 with the SCH notation (starting in 2022, taxable scholarship goes on line 8r of Schedule 1).
