If you want to change the business scope of your tax registration certificate, you must first change the business scope of the company's business license according to procedures; Then you go to the national tax or local tax to submit materials to change the tax registration certificate. You need to submit the following materials: a copy of the changed business license, the new articles of association or amendments to the articles of association, the resolutions of the shareholders' meeting (sometimes not required by the tax authorities), the original and copy of the tax registration certificate (they bring it back for replacement), and affix the official seal. Go there and fill in the relevant: change.