I contribution $7,500 (catchup) to my non-deductible IRA and TT is telling me the limit is $7,000 for 2023. I believe this is an error in the software. Please confirm.

Nevermind, I have to check something else.

Remember, you are working on a 2022 tax return, not 2023.

The IRA contribution limit including catch-up for age 50 and above, is $7000 for 2022.  It increases to $7500 for 2023 contributions including catch-up.

Take a look at the following from the IRS for more information:  IRA FAQs