You'll need to print your return and file it by mail. Be sure to sign it and attach any required documents, such as a copy of your W-2.
The IRS computers shouldn't have rejected your return, but sometimes they do when they see a duplicate SSN. See this previous TT answer for more detail: https://ttlc.intuit.com/questions/3558510-can-i-claim-eic-head-of-household-if-other-parent-is-claim...
**Answers are correct to the best of my ability but do not constitute tax or legal advice.
