After the integration of the five certificates, the taxpayer identification number of the enterprise is the "social unified credit code" at the beginning of "9 1" in the business license.

The tax registration certificate number is the tax "identity card" issued by the issuing authority. According to different industries, there are national tax registration certificates and local tax registration certificates.

The tax registration certificate of national tax has certain rules, such as 320 102 136 160586, 320102 is the administrative division of the company, and136160586 is the organization code of the company.

Before 200 1, the laws of local taxation bureau and national taxation bureau were the same. Since 200 1, the registration number of local taxation bureau has been automatically generated by computer in sequence. Now it's the same number as the national tax.

Coding rules:

1. The tax registration certificate number consists of 6 administrative division codes and 9 organization codes.

2. The reasons for individual industrial and commercial households to apply for tax registration certificates are: the old ID card 15 digits plus five zeros or the new ID card 18 digits plus two zeros.