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View information on extension payments for Individual Income Tax (Sole Proprietorships).
IL-1040 Address Change
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Claiming Disaster Relief
Locate taxpayer information on claiming disaster relief
Unemployment & Withholding Tax for Household Employees
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Withholding Tax for Household Employees
View additional information and reporting requirements for filing Withholding Income Tax for Household Employees.
File Business Taxes
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Withholding Income Tax Web Filing
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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.
IL-2848 Power of Attorney
Access information on IDOR Power of Attorney filing requirements.
Error Notice & Bill Inquiry
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Individual Income Tax Payment
Check the status of your Illinois Individual Income Tax refund using 'Where’s My Refund?'
Business Tax Account Summary
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1040 ES Payment Inquiry
View estimated payment details for your Individual Income Tax Return with MyTax Illinois.
View your current year 1099-G Certain Government Payments information online with MyTax Illinois.
Taxpayer Answer Center
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Taxes at Fairs Festivals Flea Markets and Craft Shows
View information on Illinois sales tax requirements for retailers.
File Income Taxes
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Obtaining a Copy of a Tax Return
Access information on filing Form IL-4506 to obtain a copy of a state tax return.