Tax Consultant file taxes for a non US LLC sole proprietor

I need advice on how to file my taxes, I am a non-US resident and live in Mexico, in 2016 I incorporated an LLC in Florida as a sole proprietor and bought a property in Miami Florida. That property was leased in 2020 up until now, last year I filed tax for years 2016 -2020 including forms F1120, Schedule G, F4562 depreciation and amortization, and F5472 information return 25 % Foreign Owned US corporation.

I want to know if this is the correct way to file, or if I need to file also the 1040NR and not like a corporation? And also, If I had to tell the IRS that I was going to file as a corporation? How is the correct way to do it?

I would like advise filing 2021