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You can write your own software or buy software from an accepted electronic filer (third party). See Tax-Prep Software for Business Income Tax (BIT) Filers for more information.
Other Related Links
- Do I have to register with Illinois to file IL-1040 tax returns electronically through the modernized e-file (MeF) program?
- May I use the MyTax Illinois program if I am claiming a credit on Line 15 of my IL-1040?
- What are the electronic options for filing and paying business income and replacement tax?
You may access additional information by searching the entire Illinois Department of Revenue website.
If you have additional inquiries, you may submit them on the Questions, Comments, or Requests form.