Investigations Division
Open
101 W Jefferson St
Springfield, IL 62702
The Illinois Department of Revenue (IDOR) is dedicated to excellence in managing the state's tax revenue and providing essential services to individuals, businesses, and local governments. Their mission focuses on funding Illinois' future through effective tax administration and compliance support.
IDOR offers a variety of programs and resources, including assistance with individual income tax, business registration, and fraud prevention. They also provide tools for taxpayers to manage their accounts online, check refund statuses, and access important tax-related information.
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