Youre filling it out wrong then, I did the same thing. Youre entering the amount as a 2021 distribution, instead of 2020.

Go to the 8915E and check the 2020 Covid box near the top, then drop down to Lines 12 (non IRA) or 26 (IRA) and put in the 1/3 amount, that will transfer it to the 8915F and the correct line of the 1040.