What does social security tax convergence mean?

People who pay social insurance must also file tax returns. Association refers to the first association between the employer's insurance registration information (or engineering project insurance registration information) transmitted by the social security agency and the tax department's tax registration information, or the personal insurance registration information transmitted by the social security agency and the tax department's natural person registration information. The social security tax association means that people who pay social security also have to file tax returns. The basis of social security payment is the same as that of individual tax payment, both of which are wages; After the integration of the five certificates, the relevant information of social security and individual tax will be cross-examined.