Goods and Services Tax Identification Number.  It should be registered by every commercial dealer.

 The GSTIN number which is the tax identification number came into existence to replace the TAN.

 The GSTIN consists entirely of 15 digits.

 The first two digits contain the state code of a particular state.

 The next 10 digits include the taxpayer's permanent account number.

 The thirteenth digit contains the entity number of the same leaf holder of the state.

 The next issue contains Z which is basically.

 15 digits include checksum code.