Three tax problems refer to the abnormal situation of taxpayers in the tax system of the tax authorities, including the enterprise’s failure to declare taxes overdue, the enterprise’s tax arrears and unpaid taxes, and the invoices or invoices obtained by the enterprise. There are abnormalities in the invoices issued. Tax Jin III is also called the "Golden Tax III System", which refers to the establishment of a comprehensive big data tax identification system with "one platform, two-level processing, three coverages, and four systems". Through further improvement and standardization, it has gradually formed A system software that takes the collection and management business system as the main body, includes four applications of administrative management, external information and decision support, and covers all tax types, all work links, the state and local tax bureaus, and is networked with relevant departments.