For legal persons and other organizations that have obtained the unified social credit code, the taxpayer identification number uses the unified social credit code of 18 digits. After the integration of three certificates, the business license and all codes. Only when the tax registration is completed can the tax registration number be obtained. If the general individual industrial and commercial households do not apply for the organization code certificate, the tax registration number will be the ID number plus the identification number. The unified social credit code certificate number on the business license is also your company's tax number and registration number.