Since this is an unusual situation I highly recommend you seek local professional assistance so you get things done correctly.
From what you said you had a SMLLC that you treated as a MMLLC filing a 1065 which the IRS said was incorrect but you are going to continue the error by filing another 1065 to close the LLC instead of the Sch E on the 1040.
Then you retitled the property from your old LLC to your name which was really not needed since a SMLLC is the same thing as you and it did not have to be done to retitle it to the new partnership (or S-Corp).
And then you contributed the rental to the new entity.
I don't know if you had to do this for mortgage regulations in order to transfer the property but I think you did more than was really needed and you are continuing to make unneeded moves.
This is why I once again urge you to sit down with a local tax pro ... if you are now filing the 2020 returns for partnerships or S-Corps then they are now very late and are accruing penalties unless you put them on extension ... then you have until 9/15 to file.
