If you missed adding a W2 when filing your tax return, you'll want to determine if the IRS or state has accepted your tax return. You can check your refund status here. If they have accepted your return, then you may need to amend your tax return. If your return was rejected, you can add the W2, correct the reason for rejection and resubmit. You will receive an email from us on how to fix the return
Please see these TurboTax FAQ's for more information:
https://ttlc.intuit.com/community/amending/help/how-do-i-add-another-form-like-a-w-2-or-add-change-u...
https://ttlc.intuit.com/community/amending/help/how-do-i-amend-my-turbotax-online-return/00/27577
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