Excess 401(k) contribution

I had an excess 401(k) contribution in 2023 and received a 1099-R with code P in 2024. I was instructed to amend my 2023 return to include the taxable portion of the excess contribution (earnings) and that the remaining excess contribution would be recharacterized as an IRA contribution. How do I enter this in my amended 2023 return.

Thank you,

Mark

posted