Online Access to Federal and State Tax Forms and Schedules
Federal Tax Forms and Publications (Download current year tax forms and publications from the Internal Revenue Service website.)
Tax Information for Individuals
Tax Information for Businesses
Illinois Department of Revenue
State of Illinois Forms and Publications for Individuals and Businesses
State Tax Forms for all 50 states
Important Phone Numbers and Addresses
Telephone Assistance for Individuals: 1-800-829-1040 (Monday through Friday from 7 a.m. to 7 p.m. local time)
Telephone Assistance for Businesses: 1-800-829-4933 (Monday – Friday, 7 am – 7 pm local time)
Telephone Assistance for people with hearing impairments: 1-800-829-4059 (TDD) (Monday – Friday, 7 am. – 7 pm local time)
Contact an IRS Office in Illinois
Local Offices (Open Monday - Friday, 8:30 am to 4:30 pm)
Chicago: 230 S. Dearborn Street, 312-292-4912
Des Plaines: Maine North Regional Building, 9511 Harrison Avenue, 847-294-4200
Orland Park: 14479 John Humphrey Drive, 708-873-8310
Schiller Park: 5100 River Road, 847-671-7541
Illinois Department of Revenue
General number: 1-800-732-8866 or 217-782-3336 (Monday - Friday, 8 am - 5 pm)
Telephone Assistance for people with hearing impairments: 1-800-544-5304
Business Hot Line: 217-524-4772 (Monday - Friday, 8 am - 5 pm)
Other Department Phone Numbers
Regional Offices (Open Monday - Friday, 8:30 am - 5 pm)
Chicago: James R. Thompson Center - Concourse Level, 100 W. Randolph Street, 800-732-8866
Des Plaines: Maine North Regional Building, 9511 Harrison Street, 847-294-4200
