Yes, if you want to deduct traditional IRA contributions, you can file 2020 1040X to claim a refund. If you do not deduct, you can file Form 8606 (which can be mailed to the IRS alone) and the amount will not be taxed in the future when you receive a distribution. See What Is IRS Form 5498? - TurboTax Tax Tips & Videos - Intuit
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