When to report IRA basis?

     I'm turning 73 this year (2025) and took my first RMD early in the year. This year, after taking the total RMD, I also did a partial Roth conversion, as I have for six of the past seven years.

     After many years of having a CPA do our taxes, because our CPA was retiring, this year I filed our 2024 return myself using TurboTax.

     Our 2023 tax return (done by the CPA) reports $12,485 basis in my Roth contributions as of 12/31/2022. Filing via TurboTax for 2024, it was very unclear whether I should or should not report this basis, so I did not.

     My question: Am I eligible to report the basis on our 2025 return? Also, do you have any caveats or heads-up advice about how  to handle basis?