Investors & landlords

Thank you all so much for your help.  Am I (hopefully) correct in assuming that since the sale did not occur until 12/20/2020, that I am okay to "run" to a tax professional now, before filing my 2020 tax return?  I did not have to establish a partnership PRIOR to completing the sale, did I?  That is the only part I am unsure of.

 

If I am missing anything else, please of course, feel free to enlighten me.