IRS Offices in Illinois

IRS Taxpayer Assistance Centers in Illinois provide scheduled in-person tax help for residents who cannot resolve account issues online or by phone, offering direct access to IRS staff for complex matters including identity theft, payment plans, and audit support.

IRS Offices locations are available in 12 cities across Illinois. They are spread across 11 counties.

Cities with the highest concentration include Mount Vernon, Decatur, Chicago, which host full-service IRS Taxpayer Assistance Centers serving the largest taxpayer populations in the state.

Residents of Illinois should call 1-844-545-5640 to schedule a TAC appointment rather than walking in, and should try to resolve issues through IRS.gov or by phone first, as TAC appointments are reserved for complex matters that cannot be handled remotely.

Residents of Illinois who need help with tax issues should first try the IRS website at irs.gov, the automated phone line at 1-800-829-1040, or the IRS2Go app before scheduling a TAC appointment. Free tax preparation is also available through VITA and TCE sites statewide for eligible low-income and senior taxpayers.

Browse IRS Offices by county across Illinois to find the nearest location.