Principal Controller of Communication Accounts (CCA) of Tamil Nadu circle under the Department of Telecommunications (DoT) is responsible for collecting telecom revenue, disbursement of Universal Service Obligation (USO) subsidy, and various other related activities in the state. Details about USO schemes in Tamil Nadu, mobile infrastructure, statistics, etc. are provided. Information related to challan for payment of license fee or spectrum charges and relevant check lists are given. Details of employees' pension disbursing, authorities, tax exemptions etc. are also available. Users can...