重点群体创业成立的个体工商户享受税收优惠政策未满3年时转成个人独资企业，能否继续享受相关优惠政策？

Core Viewpoint - The article provides a detailed guide on how to download and manage electronic invoices through the electronic tax bureau app, emphasizing the importance of digital tools in tax management [7][10]. Group 1: Invoice Download Process - Users can log into the electronic tax bureau app and navigate to the "Invoice Usage" section to access the "Full Invoice Query" feature [7]. - The app offers two query modes: "Full" and "Last 24 Hours," allowing users to select the type of invoice they wish to retrieve [10]. - After entering the required invoice number and conditions, users can view the invoice details, including basic information, seller, and buyer information [10][12]. Group 2: Invoice Delivery Options - The system provides multiple options for downloading invoices, including viewing the invoice, QR code download, PDF download, OFD download, and XML download [13][14]. - Users can choose the download method that best suits their needs, enhancing flexibility in managing invoices [13].