Amend 2020 return
See the attached link
See the following link: https://ttlc.intuit.com/community/amending/help/how-do-i-amend-my-turbotax-online-return/00/27577
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You will not be able to amend your tax return until it has been accepted by the IRS. Please see the TurboTax FAQ here for more information on amending a 2020 tax return.