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@Nmont The IRS is not accepting/rejecting  2023 returns until January 29.   So your return is on a server in "pending"---with millions of other returns (possibly your ex's) waiting for the IRS to open and begin to accept or reject the e-file.   If yours is accepted first, your ex is the one whose will be rejected if he claims the children.  It is not "first come first serve" in the pipeline of e-files waiting on servers.  So you will simply have to wait until sometime on or after January 29 for the email that tells you if your return was accepted or rejected.   If it is rejected for duplicate use of the children's SSN's----you already know what to do----print it, sign it and file it by mail and let the IRS sort it out.

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