Can I file 2020 and get a refund

No.   The deadline to file a 2020 tax return and get a refund was May 17, 2024.  Any refund for 2020 has been forfeited.   TurboTax no longer provides software for 2020 returns nor would it be supported or provided with updates even if you can find it on eBay, etc.

google it to find 2020 tax return filing (for free, no less).

But, as pointed out, no refund will be issued.

@virtualci   

If you have a simple return and want to file for free you can fill out the forms by hand.  Here are some basic forms.....

Here is the 2020 1040 return

https://www.irs.gov/pub/irs-prior/f1040--2020.pdf

or if you want bigger type use 1040SR for Seniors,

https://www.irs.gov/pub/irs-prior/f1040s--2020.pdf

2020 1040 Instructions

https://www.irs.gov/pub/irs-prior/i1040gi--2020.pdf

2020 EIC and Tax Tables

https://www.irs.gov/pub/irs-prior/i1040tt--2020.pdf

Schedules 1-3

https://www.irs.gov/pub/irs-prior/f1040s1--2020.pdf

https://www.irs.gov/pub/irs-prior/f1040s2--2020.pdf

https://www.irs.gov/pub/irs-prior/f1040s3--2020.pdf