Illinois Department of Revenue
 
 
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Telecommunications Infrastructure Maintenance Fees

 
 
Name Description
  WebFile & WebPay your Form RT-10 and RT-10-X Online
RT-10 Telecommunications Infrastructure Maintenance Fees (TIMF) Return (R-04/10)
RT-10-X Amended Telecommunications Infrastructure Maintenance Fees (TIMF) Return (R-04/10)
 
 
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