Agencies
Services
Electronic Transmitters and Software Developers
Filing Specifications
- Business Income Tax - ( MeF - Modernized e-File)
- Excise/Misc. Taxes - download updated transmitter information below*
- Individual Income Tax - Note for prior years submissions: Do not submit test packages for prior years if your test package was previously approved for that year. If your 2D package was not approved for a prior year, but you plan to submit 2D returns for that year, contact us at REV.VendorForms.gov to obtain a test package.
- Electronic Filing
- 2-D Barcode Specifications for Tax Year 2024 (new 11/01/24)
- 2-D Barcode Test Package for Tax Year 2024 (updated 11/18/24)
- 2-D Barcode Specifications for Tax Year 2023 (new 11/07/23)
- 2-D Barcode Test Package for Tax Year 2023 (new 11/07/23)
- 2-D Barcode Specifications for Tax Year 2022 (new 11/17/22)
- 2-D Barcode Test Package for Tax Year 2022 (new 11/17/22)
- Sales & Use Taxes
- Withholding/Payroll
Electronic Transmitter Information for Excise, Sales & Use, and Withholding Taxes
NOTE: If your electronic filing software produces printed forms, you must separately enroll and test printed forms. See Substitute Forms Developers.
Level the Playing Field for Illinois Retail Act
For information regarding Certified Service Providers (CSPs) and Certified Automated Systems (CASs), refer to the Resource Page for the Level the Playing Field for Illinois Retail Act.