Yes, You must enter current year conversion (2020) from Traditional Ira to Roth Ira on your 2020 income tax return. The amount on 1099-R line 2 on form 1099R is automatically entered on line 15 of 1099-R, if it was left blank.
With a backdoor Roth, you basically start the money off in a traditional IRA, transfer it to a Roth IRA and then pay the taxes you owe on that money now so that you can let your investments grow tax-free and enjoy tax-free withdrawals later. Income limit In 2020 is $139,000 for single and $206,000 for married filing joint.
