How do I access my .tax file for my incomplete 2020 taxes if I never downloaded any software? Do I have to pay to download software just to retrieve this?

I started my 2020 taxes a few months ago on TuboTax online (free version) and never finished. I'm trying to finish now, but TurboTax will only allow me to download a .tax file, which I don't think I even have? And I even if I do, I can't open it without the turbotax software, which I never downloaded. Is there anywhere else that my data is saved, or even a way I can just start over?