My tax return was rejected because of an IP PIN. Which IP PIN am I supposed to use?

Use the IP PIN issued for the calendar year in which you are filing, not the tax year of the return. That is the part that trips people up.

If you are filing any federal return during 2026, including a 2025 return or even a late prior-year return, you use your 2026 IP PIN. The IRS issues a new 6-digit PIN every calendar year, usually starting in January.

Common rejection reasons:

• You entered last year's IP PIN instead of this year's
• You only entered the taxpayer's PIN, but the spouse also has an IP PIN and needs one entered on a joint return
• You created or retrieved an IP PIN after starting the return, but the software cached the earlier data
• You mistyped the PIN or confused it with a self-select e-file PIN

How to fix it:

• Log in to your IRS Online Account and retrieve the current-year IP PIN
• Confirm whether both spouses have one
• Re-enter the PIN exactly as shown
• Re-transmit the return

Important: The IP PIN is not optional if the IRS assigned one to you or if you opted into the program. If you file electronically without the correct PIN, the IRS will reject the return automatically.

Can you use last year's PIN? No. IP PINs expire each year. A 2025 PIN is not valid for returns filed in 2026.

What if the return keeps rejecting?

• Double-check whether the spouse also has an IP PIN
• Make sure you are pulling the PIN from the IRS site, not from last year's PDF return
• If e-file still fails, paper filing is the fallback, but refund processing will usually take much longer