If you already filed and claimed the children, and your return was accepted, then you will need to amend your return after it has been fully processed by the IRS. The other parent who can claim them will have to file by mail. By using their SSN's you have blocked anyone from e-filing using the children's SSN's on a return for this year. Waiting for you to amend will not help them. He can mail his return whenever he has it ready.
What is not clear----who was the custodial parent? Who did the children live with? Who did they spend the most nights with in 2023? The IRS cares about physical custody. Is there a signed agreement between you and the other parent? Is there a signed form 8332?
**Disclaimer: Every effort has been made to offer the most correct information possible. The poster disclaims any legal responsibility for the accuracy of the information that is contained in this post.**
