Your only choice right now is to mail in the return and you do not need to use the IP PIN when mailing.
If you want to use an IP PIN to file your taxes and you lost your CP01A letter (or never received it), you can:
- Retrieve your IP PIN online at the IRS's Get an IP PIN site; or
- Call the IRS at 1-800-908-4490 to have your IP PIN mailed to you (this can take up to 21 days)
