Core Viewpoint - The article emphasizes the transition of tax filing from offline to online through the optimized electronic tax bureau app, highlighting the importance of maintaining accurate invoice information for efficient tax management [1]. Group 1: Electronic Tax Bureau App Features - The electronic tax bureau app allows taxpayers to manage tax declarations, invoice management, and certificate issuance seamlessly [1]. - The app has undergone continuous iterations to enhance user experience in high-frequency business operations [1]. Group 2: Invoice Information Maintenance - To maintain invoice basic information, users can navigate to the "Invoice Usage" section and select "Invoice Basic Information Maintenance" [3]. - Users can manage invoice titles by adding new titles and automatically filling in enterprise information as needed [4]. - Project information can be added by selecting the relevant project name and tax classification, ensuring accurate tax rate input [5]. Group 3: Customer and Additional Information Management - Customer information can be maintained by adding necessary details such as customer name and taxpayer identification number [6]. - Additional information can be added by selecting the type of data (text, numeric, date) and saving it accordingly [7].

Group 1 - The article provides a detailed guide on how to use the electronic tax bureau app for various tax-related tasks, including switching to a business identity and managing invoice information [1][2][3] - Users can switch to a business identity by logging into the app and selecting the appropriate option in the account center [1][2] - The app allows users to maintain invoice header information, project information, customer information, and additional information for tax purposes [8][16][25][32] Group 2 - The process for adding invoice header information includes selecting the option to auto-fill business information and saving the details for future use [8][14] - Users can manage project information by adding project names and selecting tax categories, which can be quickly accessed when issuing invoices [16][20] - Customer information can be maintained by adding necessary details such as customer name and taxpayer identification number, facilitating quick access during invoice issuance [25][29] Group 3 - The article explains how to maintain additional information and scene templates, allowing users to quickly add remarks or multiple pieces of information when issuing invoices [32][36] - Users can create and manage scene templates that link to additional information, streamlining the invoicing process [32][41] - The app also includes a feature for self-checking tax declarations, enabling users to verify their submissions and correct any discrepancies [49][50][55]