It is not clear what you actually did. If your return was rejected you should not have clicked on anything that said "amend." Amending is a special process that you should only use if your return was filed and fully processed with a mistake or missing information. An amended return requires the use of a Form 1040X which must be printed, signed and mailed.
Some people mistakenly use the term "amend" when all they mean is that they made a change to the return before filing it, so it becomes confusing when we try to understand what you did.
What SHOULD have happened when your return was rejected, is you should have printed, signed and mailed the return claiming the children. Then the IRS would contact both parties to sort out who could legally claim them as dependents.
If you can explain more clearly what happened with your tax return we can give better advice.
**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.**
