The IP PIN is a six-digit number that the IRS assigns to victims of tax-related identity theft. The IRS will send you a CP01A notice with your new IP PIN by early January of 2024. That's the one you'll need to file your 2023 return.
If you know you need 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)