The IRS - not eFile.com - has rejected your return and you are required to make a correction to the Dependent's IP-PIN.
Solution: Please sign in to your eFile.com account now and click on My Return in the upper left and review the IRS message on the right.
1. Sign in: https://mytaxes.efile.com/1040/SignIn/
2. Either make the correction to the Dependent's IP-PIN here or obtain a new IP-PIN from the IRS.
If you have questions, please contact us as soon as possible so we can assist you with your Tax Return.