System configuration error. The system configuration error in the installation process of natural person electronic tax bureau will lead to overtime waiting and installation failure. The natural person electronic tax bureau is a tax system specially developed to facilitate natural persons to handle personal income tax online. Its online functions are divided into four categories *** 147 items, mainly including natural person information registration, special additional deduction information collection, income tax detailed inquiry and appeal, business income declaration, declaration correction and invalidation, preferential filing inquiry, tax declaration, tax refund application and tax record issuance.