Excess Roth IRA coding

[Sas0798]

Made $7500 excess for 2023 in 2024, and have NIA of $1070.  Will I owe interest on associated cap gains if I don't pay gains now via a 2023 amended return, making my own 1099-R with codes P&J?

I've started in TurboTax and taxes of $399 show which is 37% which seems crazy considering my effective tax rate was 8%.

Had all reversed before 2023 tax deadline so no penalty.

[fanfare]

your allocable earnings are not capital gains, that is ordinary income to be included on 1040 Line 4b.

As pointed out by dmertz  elsewhere you might get a code 8J or code PJ depending on the custodian.

Usual assumption on this forum  is code PJ but according to Pub 590 in your case it should be 8J which means you will report this on your 2024 tax return.

@Sas0798 

[Sas0798]

Thanks.  So even though the contribution was for 2023, I report on 2024 tax return vs. amending 2023?
Don’t understand why short term gain I made gets classified as income…