It is impossible to e-file twice. The IRS will only accept one e-file with your SSN on it, and any others will be rejected. Just wait and see what the IRS does with the return(s) you filed. They will begin to accept/reject returns on January 29. Do not try to make any changes to your return at this time.
**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.**