I made an error on my 2021 Taxes and did not defer some income (cash basis) to 2022 income. I did not catch this until a few weeks ago. I filed an amended return for 2021 and with the corrected income for 2021 I had an excess contribution to my SEP-IRA for 2021. I contacted Vanguard and had the excess removed from.
How do I report the excess contribution and pay the penalties? Should I have included a substitute 1099-R with the amendment? Or do I include a substitute 1099-R with the 2022 taxes or wait until next year for a 1099-R from Vanguard?
Thanks in advance.
