Solved
Its says on my childs fathers return that someone has claimed our son, but i did not claim him
To prevent fraudulent returns, the IRS will only accept each dependent's SSN once in their e-file system. Because you filed first and used your child's SSN, no further e-files using that SSN will be accepted. The other parent will need to print, sign, and mail in their tax return to the IRS. Their tax return will be accepted if they paper file.
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