To apply for changing the business scope of the business license, you need to submit some documents and materials. Specific requirements may vary from region to region. You can consult the local administrative department for industry and commerce or a lawyer. If you need specific guidance, I suggest you consult a professional lawyer or agency to ensure that your application can be successfully passed.
In addition, if a catering service license has been obtained, but the business license does not indicate that catering services can be provided, it is necessary to apply to the local administrative department for industry and commerce for changing the business scope of the business license before joining the catering service business.