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Important Notices
2025 Illinois Tax Filing Season Begins January 27
The Illinois Department of Revenue will begin accepting 2024 state individual income tax returns on Monday, January 27, the same date that the Internal Revenue Service begins accepting federal individual income tax returns.
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
- When do I have to pay my property taxes?
- How do I check the status of my individual income tax refund?
- What are the retailers' occupation and use tax rates in Illinois? Where can I find a list of these rates?
- What is the tax rate for property taxes?
- How do I verify a resale number is valid and active?
- How do I buy property for taxes in Illinois?
Trending Forms
- CRT-61 - Certificate of Resale
- 2023 IL-1040, Individual Income Tax Return
- REG-1, Illinois Business Registration Application
- RUT-50 Instructions
- IL-W-4, Employee's and other Payee's Illinois Withholding Allowance Certificate and Instructions
- RUT-25 Instructions
- IL-2848, Power of Attorney
- STAX-1, Application for Sales Tax Exemption
