Yes, your refund will be delayed. The IRS will process the first return filed and will most likely reject your return.
To fix this, you’ll need to:
Print and mail your return.
Provide documentation proving your right to claim the child.
Don’t send this documentation with your return, but expect to receive a request from the IRS requesting it. After the IRS investigates and makes a decision, the person who incorrectly claimed the child will:
Be required to adjust the return to remove the child-related benefits
Be subject to penalties and interest
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