IRS Illinois Customer Service Number, Internal Revenue Service Illinois branch offices, addresses, customer service centers, locations, taxpayer centers, hours of operations, toll free helpline number, customer support number and email id with information like IRS application, inquiry, filing, payments, refunds, credits and deductions, help and resources, appointment information in Illinois and their cities.

Taxpayers who are looking IRS Illinois customer service phone number or toll free phone number of IRS Illinois, and Internal Revenue Service Illinois contact number, IRS Taxpayer Assistance Centers (TACs) in Illinois, etc. So, as this page we are sharing all contact information of IRS Illinois customer service department including Internal Revenue Service Illinois customer service office address, telephone number, fax number and official web page link.

IRS Illinois Customer Service Contact Details

Below, we are furnished the contact information of IRS Illinois customer service help teams. You can also get the details of IRS Illinois office address, important contact numbers and enquiry numbers. The customers who want to share their complaints, suggestions, feedback and reviews with the IRS (Internal Revenue Service) Illinois can use the various contact modes we are sharing in this article below.

IRS Branch Offices and Taxpayer Assistance Centers (TACs) in Illinois:

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City NameOffice AddressWorking Hours of ServiceTelephone*
Bloomington301 S. Prospect Rd.
Bloomington, IL 61704
Monday-Friday – 8:30 a.m.-4:30 p.m.
(Closed for lunch 11:30 a.m.-12:30 p.m.)
(309) 661-0032
Champaign310 W. Church St.
Champaign, IL 61820
Monday-Friday – 8:30 a.m.-4:30 p.m.
(Closed for lunch 11:30 a.m.-12:30 p.m.)
(217) 398-5210
Chicago230 S. Dearborn St.
Chicago, IL 60604
Monday-Friday – 8:30 a.m.-4:30 p.m.(312) 292-4912
Decatur306 W. Eldorado
Decatur, IL 62522
Monday-Friday – 9:00 a.m.-4:30 p.m.
(Closed for lunch 11:30 a.m.-12:30 p.m.)
(217) 862-6015
Downers Grove2001 Butterfield Rd.
Downers Grove, IL 60515
Monday-Friday – 8:30 a.m.-4:30 p.m.(630) 493-5291
Fairview Heights380 Fountain Office Ct.
Fairview Heights, IL 62208
Monday-Friday – 8:30 a.m.-4:30 p.m.
(Closed for lunch 11:30 a.m.-12:30 p.m.)
(618) 632-2567
Galesburg2066 Windish Dr.
Galesburg, IL 61401
Monday-Friday – 9:00 a.m.-4:30 p.m.
(Closed for lunch 11:30 a.m.-12:30 p.m.) **This office is closed 3/4 & 3/7**
(309) 345-4158
Mt. Vernon 105 S. Sixth St.
Mt. Vernon, IL 62864
**This office is closed until further notice**(618) 632-2567
Orland Park 14479 John Humphrey Dr. Orland Park, IL 60462Monday-Friday – 8:30 a.m. – 4:30 p.m.(708) 873-8310
Peoria 2415 West Cornerstone Ct.
Peoria, IL 61614
Monday-Friday – 8:30 a.m.-4:30 p.m.
(Closed for lunch 11:30 a.m.-12:30 p.m.)
(309) 621-7273
Quincy 3701 East Lake Centre Dr.
Quincy, IL 62305
Monday-Friday – 8:30 a.m.-4:30 p.m.
(Closed for lunch 11:30 a.m.-12:30 p.m.)
(217) 224-8208
Rockford 4920 E. State St.
Rockford, IL 61108
Monday-Friday – 8:30 a.m.-4:30 p.m.
(Closed for lunch 12:00 noon – 1:00 p.m.) **This office is closed 3/2**
(815) 334-7026
Schiller Park 5100 River Rd.
Schiller Park, IL 60176
Monday-Friday – 8:30 a.m.-4:30 p.m.(847) 737-6688
Springfield 3101 Constitution Dr.
Springfield, IL 62704
Monday-Friday – 8:30 a.m.-4:30 p.m.(217) 862-6015


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Internal Revenue Service Illinois e-help Desk Toll-Free Number:
  • 1-866-255-0654 (Within the United States)
  • 1-512-416-7750 (outside the United States)
  • e-help desk Hours of Operations: Monday thru Friday 6:30 AM – 6:00 PM Central Time
IRS Illinois Customer Service Phone Number:
  • 1-800-829-1040 toll free for Individuals
  • 1-800-829-4933 toll free for Businesses
  • 1-877-829-5500 toll free for Exempt Organizations
  • 1-877-829-5500 toll free for Retirement Plan Administrators
  • 1-877-829-5500 toll free for Government Entities
  • 1-800-829-4059 TDD Toll-Free for people with hearing impairments
  • Hours of Operation: Monday – Friday, 7 a.m. – 7 p.m. your local time (Illinois & Illinois follow Pacific Time)

IRS Illinois Customer Service Email ID: Click here


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IRS Corporate Headquarters Office Address:

Location: Internal Revenue Service Headquarters Building, 1111 Constitution Avenue, Northwest, Washington, District of Illinois, DC, United States


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Useful Links of IRS Illinois Customer Service Support:

Click here for general help and support online

Click here to find local IRS Branch Offices

Click here to find Taxpayer Assistance Centers

Click here to get online Help and Resources

Click here to Contact your local Taxpayer Advocate

Click here to File Paper Tax Returns


If you are unable to connect with the IRS Illinois customer service representatives, kindly you can contact to the your local customer service support by following the above mentioned IRS Illinois customer service, local office address, telephone numbers, fax numbers, email ids and more. You can also contact to the offices located in your city or can visit the customer service office directly, send an email, and write a letter. For further details we recommend you to visit the official website of IRS.

IRS Official Website: