Group 1 - The article provides a detailed guide on how to use the Electronic Tax Bureau APP for tax-related services, emphasizing the interaction with the virtual assistant "Yueyue" for inquiries and assistance [2][7]. - Users must log in as individuals and select their local tax authority down to the district or county level to access services [4][10]. - After selecting the service authority, users can input their questions, and "Yueyue" will provide intelligent responses or allow for human interaction if needed [3][30]. Group 2 - The article outlines the steps for modifying the service authority in case of logging in from a different location, ensuring users can still access the correct tax services [8][19]. - For local logins, users can also modify their service authority by navigating through the app to the personal center and selecting the appropriate authority [13][28]. - It is recommended to select the service authority down to the district or county level to enhance the tax service experience and ensure accurate connections with staff [30].