Group 1 - The article discusses the process for businesses to log into the electronic tax bureau and file environmental protection tax [1][2] - It outlines the steps for tax source collection and combined declaration, specifically focusing on the environmental protection tax [3][4] - The article emphasizes the importance of filling in accurate information such as pollutant categories and discharge permit numbers during the tax source information entry [6][7] Group 2 - The article provides a reminder that businesses without a discharge permit can use standardized discharge port numbers or create their own [7] - It mentions the role of various tax authorities in overseeing the tax filing process, including the National Taxation Bureau and local tax offices [8] - The article encourages readers to engage with the content for learning purposes, indicating that it is a non-official platform for sharing tax-related knowledge [10]