I filed a tax return for someone who was to be claimed as a dependent on their parent's tax return, except the checkbox was not checked indicating that they would be claimed on the parent's return. The parents return was filed a couple weeks later and it was rejected by the IRS for that reason. I amended the dependent's tax return and filed it indicating they would be claimed as a dependent on the parent's tax return. Is the best way to resolve the parent's tax return to mail in a paper copy now or is there a way to e-file without the IRS rejecting the return?