Illinois Department Of Revenue Customer Service
Contact Illinois Department Of Revenue
Business Hot Line:
- (217) 524-4772
- (800) 732-8866
- (217) 782-3336
- (847) 294-4200 Des Plaines, Illinois
- (618) 624-6773 Fairview Heights, Illinois
- (618) 993-7650 Marion, Illinois
- (815) 987-5210 Rockford, Illinois
- (800) 544-5304 TDD
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