After you file

If a return has already been accepted with your SSN on it, the IRS will reject any other return you try to e-file.   If you think you missed a tax break of some sort with the software you used, wait for the return to be fully processed and amend the return.

**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.**