If you haven't filed your tax returns for FY 2019-20 and 2020-21, you can still claim TDS benefits. You'll need to apply for condonation of delay to file these past returns. Once permission is granted, you can submit the returns for those years and receive your refund.
09 July 2022
As he had not filed return, he can apply for condonation for delay in filling return. After getting the permission he can file return/s of the said years and get refund back.