Protection is key when guarding your personal and financial information from fraudsters. That's why the IRS offers a vital tool, the Identity Protection Personal ID Number (IP PIN). The IP PIN is a six-digit number you can apply for voluntarily. It's known only to you and the IRS. It's valid for one year, and you'll automatically be given a new one after expiration.

To apply for an IP PIN, you must have a Social Security Number or Individual Taxpayer ID Number. You also must verify your identity to the IRS.

Suppose you file your tax return with an incorrect IP PIN. The return will be rejected, or the IRS will reach out to validate the information. For more on IP PINs, visit the IRS FAQs about the identity protection personal identification number.