I contributed $4500 to T. IRA and $2500 to Roth for 2020 tax year. I'm 34 . I requested my brokerage firm to remove $1000 excess contribution and $300 gain.

How should I enter it in the TurboTax? As I know I am going to get 1099-R in 2021 for my 2020 distribution. Do I have to still report that $300 gain in my 2020 income, even though it would be reported in 2021 1099-R?