Group 1 - The article provides a detailed guide on how to add tax personnel through the electronic tax bureau's Web and App platforms [2][4][12] - It emphasizes the importance of using the legal representative, financial responsible person, or administrator's identity to log in for adding tax personnel [3][8] - The process includes filling out necessary information such as name, document type, document number, identity type, personnel permissions, and validity period [4][12] Group 2 - The article outlines the steps for modifying tax personnel's permissions on both Web and App platforms, catering to personalized and refined permission management needs [16] - It details the procedure for changing permissions, including selecting the existing tax personnel and managing their permissions through the interface [21][30] - The article highlights the default selection of five functional permissions for newly added tax personnel, which can be modified by the legal representative or financial responsible person [6][13]