It is too late to file a return to claim the 2020 payment. The 2021 payment can be claimed by filing a 2021 tax return, even if you did not have taxable income. You would need to purchase the 2021 version of Turbotax, fill out the return, and print and mail your return.
However, if a payment was issued in your name (some payments were automatic), even if you did not receive it, you won't get a payment by filing a return. You would have to trace the previous payment.
