If you have already filed your taxes, you cannot make any changes or corrections until it has been accepted or rejected by the IRS.
Please see the below TurboTax FAQ for information on amending your return: https:// ttlc.intuit.com/community/amending/help/how-do-i-amend-my-turbotax-online-return/00/27577
Please note the Form 1040X is currently scheduled to be released on February 26, 2020.
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