I rolled back 2 of the 4 monthly RMD distributions that I took in 2020 before suspending the rest of them per the Covid 19 legislation. How do I handle reporting this?

You will encounter the screen below in the interview section. You can indicate the rollover on the two distributions.

To get to that screen above........

Since there is no RMD required for 2020,  after you enter the 1099R say it was NOT an RMD and then that you rolled it over (even if back into the same account).  

If you already entered the 1099-R as RMD and changing your answer to the RMD question doesn't work then you have to delete and renter the 1099-R form.