a，CNPJNO。 (company -XX. XXX.XXX/XXXX-XX)B，CPFNo。 (private -XXX. XXX.XXX/XX ) 1。 Tax number is the abbreviation of tax registration number; The tax number is also called the taxpayer identification number; The tax number consists of 15 digits; The first 6 digits are the administrative number of the unit; The last 9 digits of the organization code. It is such a set of numbers that constitute the unique identity number of your company! 2. The international standard customs code of export products, which some foreigners call the tax number. A ***8, omnipotent.