Approved Third Party Software Vendors for Business Income Tax (BIT)
If you choose to have a third-party file your return or payment, you may wish to choose from the following software vendors currently approved by the department to electronically file some or all Illinois business income tax returns, corresponding forms, and schedules. Third-party software also supports electronic payments.
Note: Software vendors are deemed approved after they register and have their product approved through testing. These companies may be web-based companies or traditional software development companies that produce a product for the purpose of formatting and transmitting electronic returns and payments.
For questions regarding this program, please contact the Electronic Commerce Division at 1-866-440-8680.
Note: Some taxpayers are required to pay their tax electronically using Electronic Funds Transfer.