Hello, the combination of three certificates (that is, business license, organization code certificate and tax registration certificate) does not need to apply for a business license. If the three certificates are integrated, after going through the business license formalities, they shall report to the national tax and local tax within one month and go through the tax registration and filing. Then apply for online declaration, tripartite tax deduction agreement, and if you need to issue invoices, you must also go through the invoice collection procedures. In order to replace the new three-in-one business license, enterprises must have industrial and commercial registration items to change. When the registration is changed, the change shall be made, and the original business license shall be confiscated. Take the three certificates and the official seal to the citizen center for processing. First, get the application form and the authorization form, and fill in the sample and affix the official seal. (In which district is the registered address handled, and it cannot be handled across districts) The organization code certificate IC is not required to be carried. Submit the original and duplicate of the three certificates and the application form to the acceptance window. After the materials in the acceptance window are complete, return the receipt of the enterprise registration application for 5-11working days (Pudong New Area) to obtain a new certificate-unified social credit code (Changning District can handle it on the spot for different districts in Shanghai).