How you handle this depends on whether or not it is your first year.
If you turned 72 in 2021 then you have until Apr. 1, 2022 to take the first RMD so it would not be late.
If this is not the case, you will need to file a 5329 form and request a waiver of the penalty. (The waiver would only be denied if there is no reasonable explanation and the missed RMD was not taken at all.)
Unfortunately this can only be done using the "forms" mode that is only available with the desktop software if you do not have a 1099-R to file.
If you do have a 2021 1099-R to report then the RMD question in the interview will go to the form 5329 waiver interview if you say that the 2021 RMD was not taken.
