Electronic filing of tax collected at source creates a validation, acknowledgement and deficiency cure regime for e-TCS returns. Scheme mandates electronic filing of e-TCS Returns with specified forms, data structure, PAN and TAN quoting, labelled computer media or on line transmission, and separate media per form. e-TCS Intermediaries validate, upload and transmit data to the e-filing Administrator; provisional receipts serve as acknowledgements subject to deficiency memos with a seven day cure, transmission to Assessing Officer for unresolved defects, and deeming rules when cured. Intermediaries must retain data for one year, ensure confidentiality, and comply with technical standards set by the e-filing Administrator; the Board may revoke authorisation for misconduct.