I think some of the advice above does not clearly reflect how you should account for anything taken out of a retirement account under the RMD guidelines. The requirement to take a distribution was suspended, but if you took one, you have to account for it. I believe whatever that was withdrawn should be reported as income as a normal RMD, matching the amount shown on on the 1099-R and then, if you executed a rollover, returning all or part of it back to your IRA within the 60 day allowable limit for rollovers, you would report the rollover amount accordingly.
I'm using TurboTax desktop, but I presume the online version works the same way. I took a distribution. I fill out the information as it was received from my institution for the 1099-R entry. IF I had returned all of it during the allowable rollover period, I would answer 'No' to the question of whether this was an RMD for 2020. On the 1040 form it would show the amount of the distribution on line 4a and the taxable amount on 4b as $0, indicating a rollover took place.
If I had NOT returned any of the distribution, I would answer 'Yes' to this question and select the choice that all of this distribution was an RMD. The total amount of the distribution shows up on line 4b.
I in fact did a partial rollover, so I answer 'Yes' to this question and select 'Part of this distribution was an RMD'. I then fill in the difference between the amount I originally withdrew and the amount I returned in the prompt for how much applies to the RMD. The 1040 then shows the total distribution on line 4a and the correct taxable amount on 4b.
Hopefully, this helps cover all the bases.
