Illinois Department of Revenue Forms and Documents
The Illinois Department of Revenue is a state government department in Illinois focused broadly on revenue and taxation. Its name identifies the agency’s general subject area.
The forms listed here cover three distinct document types: an individual income tax return, a certificate of resale, and an equipment exemption certificate. They span personal income-tax reporting and certificates tied to resale or equipment exemptions; the catalog entries are available in English and Spanish.
Illinois Department of Revenue forms
- CRT-61 · IL-DOR · IllinoisForm CRT-61, Certificate of Resale – Illinois
Form CRT-61 is the Illinois Department of Revenue's Certificate of Resale, a purchaser's signed statement that merchandise is bought for resale only. Fill out the form online on FillingPDF and download or print the completed PDF.
1 page - IL-1040 · IL-DOR · IllinoisForm IL-1040, Individual Income Tax Return – Illinois
Form IL-1040 is the Illinois Department of Revenue's individual income tax return for tax year 2025. Fill out the form online on FillingPDF and download or print the completed PDF to file with IDOR.
2 pages - ST-587 · IL-DOR · IllinoisForm ST-587, Equipment Exemption Certificate – Illinois
ST-587 is the Illinois Department of Revenue exemption certificate a purchaser gives a seller to document a tax-free sale of equipment for manufacturing, production agriculture, or coal and aggregate mining. Fill it out online on FillingPDF and download or print the PDF.
2 pages
About the Illinois Department of Revenue
The forms in this collection serve different purposes. The individual income tax return is the personal tax-reporting document represented here. The resale certificate and equipment exemption certificate are separate documents focused on resale and equipment exemption; they are not tax returns. Their titles identify each document’s subject, but do not establish who may use it or what supporting information may be needed.
The current catalog includes these three published forms, with English and Spanish versions listed. It may not represent every document issued by the Illinois Department of Revenue. Before using a form, check the department’s current instructions for the correct version and any applicable requirements, deadlines, fees, supporting documents, or submission method.