I made an excess IRA contribution in 2020. I've requested my broker to remove the excess plus gains. Where in TT do I enter this gain without a 1099-R?

I made excess IRA contribution in Nov 2020. I asked my broker to remove the excess plus gain. It is now March 2021. 1099-R will be issued next year 2022. I know what the removed taxable gain is but there is no 1099-R to report it. How do I report this gain as taxable income in TT?