Revenue, Department of
The primary responsibility of the Department of Revenue is to serve as the tax collection agency for state government and for local governments. The department also oversees local property tax assessments, and functions as the funding agent for the Illinois Housing Development Authority.

Abusive Tax Avoidance Transactions
View information on efforts to identify participants and material advisors of abusive tax avoidance transactions.
Estimated Payments
View estimated payment details for your Individual Income Tax Return.
Business Tax Account Summary
View e-Services available for businesses.
Error Notice & Bill Inquiry
Utilize MyTax Illinois for error notices and bill inquiries.
Unemployment Tax, Wage Reports, & Withholding Filing
File your Employer’s Quarterly Contribution and Wage Report (UI-3/40) online with Illinois Taxnet.
IL-1040 Address Change
Make IL-1040 address changes online with MyTax Illinois.
IL-2848 Power of Attorney
Access information on IDOR Power of Attorney filing requirements.
1040 ES Payment Inquiry
View estimated payment details for your Individual Income Tax Return with MyTax Illinois.
W-2 Transmitter Registration
Employers may electronically register and obtain their user ID (ETIN) and password for transmission of W-2s online.
1099-G Lookup
View your current year 1099-G Certain Government Payments information online with MyTax Illinois.
Taxpayer Answer Center
Find an answer to your tax question by category.
Unemployment & Withholding Tax for Household Employees
Access information on employer Withholding Income Tax requirements for household employees.
Verify a Registered Business
Verify an Illinois Business Registration here. Registration-taxes-revenue
Business Registration
Learn more about registration requirements for Illinois businesses.
Certificate of Resale
Learn more about Certificate of Resale requirements for Illinois businesses.
Obtaining a Copy of a Tax Return
Access information on filing Form IL-4506 to obtain a copy of a state tax return.
Tax Rate Finder
Utilize the Tax Rate Database for more information on taxes administered by IDOR.
Business Taxes Web Pay
Make business tax payments online with MyTax Illinois.
File Income Taxes
File income taxes online with MyTax Illinois.
Illinois Income Tax Filing (IL-1040)
Use MyTax Illinois to electronically file your original Individual Income Tax Return.
IL-PIN Inquiry
Access your IL-PIN online utlizing MyTax Illinois.
Income Tax Refund Status Inquiry
Utilize 'Where's My Refund?' to find out
Individual Income Tax Payment
Check the status of your Illinois Individual Income Tax refund using 'Where’s My Refund?'
Sales Tax Web Filing
File sales taxes online utlizing MyTax Illinois.
Sales and Use Tax Registration Certificate Revocation
Sales and Use Tax Registration Certificate Revocation by the taxpayer’s business name and address or Account ID.
Tax Registration Inquiry
Utilize MyTax Illinois for tax registration inquiries.
Business Tax Registration Verification
Verify an Illinois Business Registration here.
Claiming Disaster Relief
Locate taxpayer information on claiming disaster relief
Withholding Tax for Household Employees
View additional information and reporting requirements for filing Withholding Income Tax for Household Employees.
File Business Taxes
File business tax online with MyTax Illinois.
Register to Pay Business Taxes
Electronically file your original Individual Income Tax Return with MyTax Illinois.
Extension Payments
View information on extension payments for Individual Income Tax (Sole Proprietorships).
Closing Your Business
Contact IDOR when closing a business to determine tax liabilities.
Withholding Income Tax Web Filing
File Withholding Income Taxes online with MyTax Illinois.
Excise Tax Web Filings
Taxes at Fairs Festivals Flea Markets and Craft Shows
View information on Illinois sales tax requirements for retailers.
Business Tax Registration Online
File your Illinois Business Registration Application online with MyTax Illinois
Withholding Tax Coupon Booklet Requests
Make your IL -501 payment online here.
Motor Fuel Refund Inquiry
View additional information on refunds related to Illinois taxes paid on motor fuel used for non-highway purposes.