I filed my taxes in 2020 with turbo and I got a letter from irs saying confirm identity now I can’t find tax documents

2020?   And now in 2025 you are asking for help?   You are now too late to receive a refund for a 2020 tax return even if you file it and even if the tax form shows a refund.  The refund has been forfeited.    When did the IRS send you the letter?