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After you file
To fix this error, please follow these steps:
- Make sure you have entered the previous year's IL AGI correctly.
- Verify Your IL PIN
- Make sure to enter all 8 digits (This is not your 5-digit federal PIN).
- Verify your IL drivers license or state ID number is entered correctly.
- If it's your first year filing with IL, you will have to enter your IL Drivers License or state ID information.
- Enter each field exactly as it's on your IL Drivers License or state ID (First Name, Middle Name, Last Name, Suffix (leave blank if necessary), and weight.
- You may not use an out-of-state or expired driver's license.
- You may need to print and mail your return if the reject continues after re-transmitting.
What is Illinois e-file reject IL1040-8000-2 or IL1040-9900-2?
‎February 10, 2026
12:27 PM