Group 1 - The article provides a step-by-step guide for taxpayers who encounter an issue with their mobile number being empty when trying to report cross-regional matters [2][3] - Taxpayers are instructed to access the electronic tax bureau without logging in and click on the "Retrieve Mobile Number" option [3][7] - The process involves entering identification type, identification number, personal login password, and setting a new mobile number, followed by verification through facial recognition [6][10] Group 2 - The article emphasizes the importance of completing the identity verification process to successfully retrieve the mobile number [10] - Taxpayers can also utilize the electronic tax bureau APP for the same retrieval process, ensuring accessibility [6][8] - The article encourages taxpayers to use online services for tax-related inquiries and assistance, highlighting the availability of remote support through the "Yueyue" service [26][27]

Core Viewpoint - The article provides a detailed guide on how to download digital invoices through the Electronic Tax Bureau APP, emphasizing the step-by-step process for users to access and manage their invoices effectively [3][5][9]. Summary by Sections Steps to Download Digital Invoices - Users need to log into the Electronic Tax Bureau APP and navigate to the "Invoice Usage" section, then select "Invoice Information Query" followed by "Full Invoice Query" [5]. - The "Full Invoice Query" page offers two modes: "Full" and "Last 24 Hours." Users should select "Obtain Invoice," enter the digital invoice number, and click "Query" [9]. - The query results will display the invoice details, including the total amount and tax amount, allowing users to confirm the information [9][10]. Invoice Details and Download Options - The invoice details include the digital invoice number, invoice code, invoice number, issue date, amount, and tax amount [10]. - Users can download the invoice in various formats, including PDF, OFD, and XML, by clicking the "Download" button on the invoice delivery page [10].