google_ad_height = 600; Ireland/Harchandrai Road. 1. This section provides an overview of domestic rules in the jurisdictions listed below governing the issuance, structure, use and validity of Tax Identification Numbers ("TIN") or their functional equivalents. National tax number. FBR National Tax Number (NTN) Registration in Pakistan Online Apply Steps. Under Income Tax Ordinance, and Income Tax Rules, 2002,individuals having2001 Computerized National Identity Card (CNIC) issued by the National Databaseand Registration Authority, CNIC shall number be used as National Tax Number or Registration Number. E-mail: