Missed submitted tax file for 2022 on Mac, how can I amend my return?

Hi,

I filed my taxes via turbotax downloaded version (not online) and submitted it. I got my refund. Then I realized I had to amend as there was something missing.

I tried to start amend process but after some time the tax file was overridden. Somehow the original version went missing. Now I can't find my original 2022 return .tax file (not the pdf file) and can't start amend process.

How can I get my submitted tax file for 2022 so that I can start amend process again?

Thanks