Illinois is one of 41 states that collect a state income tax. If you are a full time, part-time or nonresident of Illinois and filed a federal tax return, you must also file an individual tax return with the state of Illinois.
| State Income Tax Forms | Pertains To | Use These Forms If.. |
| Individual Income Tax Return | Individual Income Earners | You earned any income in the state of IL as a full-time, part-time or nonresident. |
| W-4 Withholding Allowance | Employers, Employees | You need to file or adjust an IL state withholding tax status. |
| 6-Month Extension Requests | Individual Income Earners | You need a 6 month extension to file your state income taxes. |
| Estimated Income Tax Forms | Self-employed Individuals, Independent Contractors | You are required to pay monthly or quarterly estimated income taxes. |
| All State Income Tax Forms | Income Earners | You need to find any state income tax form applicable to Illinois. |
Illinois doesn’t collect property taxes at the state level. Property taxes are instead collected at the local level, by cities, counties and taxing districts. Homestead exemptions are automatic in Illinois.
| Property Tax Forms | Pertains To | Use These Forms If.. |
| Homestead Exemption | Homeowners | No form to file. Exemption is automatic and amounts vary by county. |
| Property Tax Exemption Forms | Home, Land, Property Owners | You qualify for any number of property tax exemptions for IL. Must file locally. |
| All Property Tax Forms | Home, Land, Property Owners | You own any property in IL, including a home, land or commercial real estate. |
All state of Illinois specific tax forms, specialty forms and motor vehicle forms provided below.
| All Other Forms | Pertains To | Use These Forms If.. |
| Motor Vehicle Tax Forms | Buyer, Seller in Vehicle Transactions | You bought or sold a motor vehicle in IL. |
| All IL Tax Forms | Any Tax Filer | You need to find any tax form applicable to Illinois. |
Illinois offers installment agreements for help paying tax bills, income tax credits and official resources for understanding and filing local property tax forms. The main Illinois tax form and instruction portal is also provided.