1. The Local Taxation Bureau is an organ that specializes in the management of taxpayers' local tax payment. To handle social security, the Social Security Bureau needs the local tax department to verify some data of the company. These two departments, one is the national tax department and the other is the social security department. The question you asked is that they only cooperate in some business aspects.

Second, there is no relationship between local tax and social security, but the provincial government requires local tax to collect social security fees, which means that local social security fees are collected by local tax departments and paid by social security departments.