Agencies
Services
Individuals
File & Pay
Manage Your Account
Special Situations
Tax Information
- Abusive Tax Shelters
- Additions/Subtractions
- Amending My Return
- Credits
- Due Date/Filing Extensions
- Estimated Payments
- Filing Requirements
- Filing Status
- Identity theft and its impact on your taxes
- IL-2848, Power of Attorney
- Interest Rates
- Letters and Notices
- Penalties
- Property Tax Number Information
- Social Security benefits and certain retirement plans
- Taxable Income
- Tax Rate
- Use Tax for Illinois Taxpayers
- Voluntary Disclosure Program