Mandatory e-payment of service tax: designated bank contacts provided to resolve procedural and operational payment queries. Mandatory e-payment of service tax requires taxpayers to remit service tax electronically and designated bank contact persons (with name, designation, bank and phone number) are provided to assist with procedural clarifications and operational issues; the Principal Chief Controller of Accounts is identified as Head of the Payment and Accounting Organisation in the Central Board for Excise and Customs.