@alberto-tello there was no reason to list 'non-dependents'. Your tax return rejected because you both listed the same child.
Your only recourse is to paper file. You can claim the 4th child. If you want to claim any of the first three, then SHE would have to amend to remove that child and THEN once her amendment fully processed, you could claim that child. It would have to occur in that order.
Once an SSN is used, no one else, can efile using that same SSN. Therefore, you have to paper file.
