Tax informatization is an important part of government informatization. Carrying out e-taxation is an important part of e-government affairs for governments at all levels. It is closely related to the informatization of the entire society, the informatization of other macro management departments, and the informatization of residents and enterprises. Electronic tax application system is the electronic, informatization and networking of traditional tax work. That means making full use of computer network applications and other technical means to realize the electronic, networked and informatized business processes including tax declaration, data processing, tax registration, invoice management, query of violation records, tax collection and management, etc. Conduct comprehensive monitoring and analysis of the tax payment and law enforcement status of taxpayers, tax authorities, and personnel, while assisting higher-level departments in implementing management and decision-making functions.