I haven't received my 2020 tax return yet, is there still a chance I can receive it?

It is too late to file a 2020 tax return to receive a refund.  The refund was forfeited if you did not file the return within three years of the filing deadline in 2021.

Or do you mean you filed a 2020 return and just did not receive your refund?   You say you were not a "resident"--please explain.    If you were a non-resident alien, you could not use TurboTax to prepare a 1040NR.   Did you file a 2020 tax return in 2021?   Provide some details.