flatface, you do nothing more. The Roth conversion is reportable on your 2021 tax return when you receive the From 1099-R near the end of January 2022, not on your 2020 tax return. In other wards, Part II is done on your 2021 tax return.
Line 14 of your 2020 Form 8606 carries forward to line 2 of your 2021 Form 8606 to be used in determining that taxable amount of your Roth conversion performed in 2021.
