Group 1 - The article discusses the process of tax source information collection and modification for property tax and urban land use tax [3][4]. - It outlines the steps for collecting tax source information, including logging into the electronic tax bureau and entering relevant details [3]. - The article explains two methods of tax declaration: confirmation declaration and form-filling declaration, providing flexibility for taxpayers [5]. Group 2 - Tax source information can be modified or deleted if errors are found, with specific steps outlined for both actions [4]. - The termination of tax obligations is addressed, particularly in cases of property transfer, with the system automatically setting the termination date [4]. - The article emphasizes the importance of accurate tax source information to ensure compliance and avoid penalties [4].