Illinois revenue board 2026

1. Click ‘Get Form’ to open the Illinois Department of Revenue BOA-1 form in the editor.
2. Begin by identifying yourself and your spouse, if applicable. Fill in your Social Security number and Federal Employer Identification Number (FEIN) in the designated fields.
3. Provide your first name, last name, and Illinois account ID. If you are representing a business, include the legal business name and any 'doing-business-as' names.
4. Complete your contact information including email address and phone numbers. Ensure that all details are accurate for effective communication.
5. If represented by someone else, attach a completed Form IL-2848 and list each representative's details as required.
6. Specify the tax type for which you seek relief, detailing liability periods and providing necessary documentation as outlined in the form.
7. Sign the petition at the end of the form. Ensure that both you and your spouse sign if applicable, confirming that all information is true and complete.

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