As you are aware starting 2010 tax season all income tax preparers must have IRS assigned PTIN number. If you do not have one, you can REGISTER with the IRS and your PTIN number will arrive within 28 days or you can register by printing and filling out Form W-12 and then mail it to the IRS.
If you already have PTIN number, you will need to RENEW your application.
If you fail to sign-up for or refresh your PTIN, penalties may apply. Tax return preparers who use their SSN, EIN, EFIN, or ETIN, instead of a valid PTIN, on tax returns or claims for refund filed after December 31, 2010 may be subject to penalty under IRC Section 6695(c).
To e-file tax returns all preparers must have an EFIN number. If you do not have one, you can REGISTER with the IRS. It will take about 30 days for you to receive it.
You can also fill out Form 8633 and mail it in.