Deductions & credits

you asked, "Was this marked as no longer a rental?"  where would i find this info?  on Form 4562, second column titled "code" there are "S" in each row.  notes at bottom of form state S means SOLD, but I did not sell it.  i am getting so confused.  i may have screwed up on my 2020 filing.  according to Carl I should have NOT marked it as converting it to personal use. do I need to file an amended return?