When you e-file, the IRS runs your return through checks for common errors or potential fraud indicators. If something is off, your return is rejected with a specific rejection code explaining the issue.

• Duplicate SSN: The Social Security number has already been used on another return
• Incorrect Personal Information: Mismatched names, birthdates, or filing status
• Math Errors: Calculation mistakes flagged electronically
• Missing Forms or Schedules: Required attachments not included

• Carefully review the rejection code explanation
• Correct any errors in your return or on supporting documents
• Verify all personal information matches IRS records
• If rejected for duplicate SSN, contact the IRS Identity Protection Unit immediately

The IP PIN is a six-digit code assigned to eligible taxpayers to prevent identity theft. It must be entered when filing your federal return to verify your identity.

• Victims of tax-related identity theft
• Residents in states participating in the IRS's IP PIN program
• Anyone who wants extra protection against fraud

• Apply online at the IRS's official Get an IP PIN tool
• Enter your IP PIN when filing your return electronically or on paper
• Keep your IP PIN confidential to prevent misuse

• Responding to IRS identity verification letters
• Common IRS notices and audit triggers
• Handling IRS notices and audits