Find Tax Information & Forms


Find tax forms and file online or use the contact information on this page to reach State and Federal tax agencies.

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Contacts for Assistance & Filing by Mail

State Information

To order forms call 800.356.6302.

For assistance call 800.732.8866. (Monday–Friday, 8:30 am–5:00 pm)

File State Taxes by Mail

Without Payment

Illinois Department of Revenue
Springfield IL 62719-0001

With Payment

Illinois Department of Revenue
Springfield IL 62726-0001

Federal Information

To order forms call 800.829.3676.

For assistance call 800.829.1040. (Monday–Friday, 7:00 am–10:00 pm)

Local Offices of the Internal Revenue Service

230 S Dearborn Str
Chicago IL 60604

Monday–Friday, 8:30 am–11:30 am, 12:30–4:30 pm

Assistance at this location is by appointment only, call 844.545.5640. Please remember to wear a mask and practice social distancing. Learn more about services offered at this location at

File Federal 1040 Taxes by Mail

Without Payment

Department of the Treasury
Internal Revenue Service
Kansas City, MO 64999-0002

With Payment

Internal Revenue Service
PO Box 931000
Louisville, KY 40293-1000

Learn more about filing through the post office at

Online Forms & Filing

Illinois Tax Forms

Scroll through the list and click on a tax form to view, download, or print it.

File Your State Return Online

Federal Tax Forms

Type a form number into the box above the search results to quickly pull up the tax form you need. Click on the form to view, print, or download it.

File Your Federal Return Online