From 2020? And you are asking in 2025? If you did not e-file your 2020 tax return successfully in 2021, you have had several years in which to ask about it, follow up and mail in the return. It is now past the deadline to file a 2020 return and receive a refund. The deadline to file a 2020 return and still receive a refund was May 17, 2024.
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