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Important Notices
Illinois Tax Filing Season Extended Phone Hours on April 15
IDOR staff is available until 7:00 PM to assist with last-minute questions about filing your IL-1040 Individual Income Tax Return or other tax topics.
- 1 800 732-8866 or 217 782-3336
- 1 800 544-5304 TTY
Over-the-phone translation services are available.
Have you received a letter or Final Notice of Tax Due assessing an Estimated Payment Penalty?
Learn why you received this letter from IDOR by visiting our webpage Letters and Notices for Individual Income Tax (illinois.gov).
Response Options for Identity Verification Letters
If you received an identity verification letter from the Illinois Department of Revenue, you can respond electronically by selecting the option that matches your letter: enter a code, take a quiz, or attach documents. No MyTax Illinois account is required. For more information, see Identity Verification Letters Information.
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Frequent Questions
- How do I check the status of my individual income tax refund?
- How do I obtain an IL-PIN and do I need it to file?
- When is my tax payment due?
- How do I get a copy of my tax return?
- What if I live or work in a state that has a reciprocal agreement with Illinois?
- Should I file an income tax return if I live in another state but worked in Illinois?
- What are the retailers' occupation and use tax rates in Illinois? Where can I find a list of these rates?
Trending Forms
- CRT-61 - Certificate of Resale (Registered Retailers/Resellers)
- 2024 IL-1040, Individual Income Tax Return, Instructions, and Schedules
- Illinois Business Registration
- 2025 Withholding (Payroll) Tax
- RUT-50 Instructions
- RUT-25 Instructions
- Power of Attorney
- ST-1, Sales and Use Tax Return
- STAX-1, Application for Sales Tax Exemption
