@egerolacpaAre you using PTO or ProSeries.  The article Lisa sent you is for PTO but EFIN works the same way whichever Intuit ProConnect product you use.

You may also want to check that your firm info matches what you have for EFIN.  If your firm info, which pulls onto the return under the Paid Preparer section, does not match the IRS' record for EFIN, the returns you e-file may be rejected.