TurboTax isn't prompting me to enter a IRA for a prior year contribution. I made a contribution for the 2023 tax year in March 2024.

[dmertz]

Even though the contribution was made in 2024, an IRA contribution made for 2023 was reportable on your 2023 tax return, not on your 2024 tax return.  If you failed to report on your 2023 tax return a traditional IRA contribution made for 2023, you must amend your 2023 tax return.