Retirement tax questions

it was not an estimated tax payment nor was it tax withholding from my pay. The income statement (1099) was from a small inheritance I received after my mom‘s death and it arrived after I had already filed my 2022 returns and made payment owed on my other income.  Since it arrived so late, it was not reported on my federal or state returns. I received a notice of delinquency from the IRS and paid that amount in 2024