Group 1 - The article provides a guide on how to check whether a client's invoice has been selected for tax deduction through the electronic tax bureau or its app [1][9] - The steps to query invoices include logging into the electronic tax bureau, navigating to the invoice query section, and selecting the appropriate query conditions [1][3] - Users can view detailed information about the invoice status by clicking on the "details" link, which shows the current label information of the selected invoice [3][5] Group 2 - The article emphasizes the importance of understanding tax benefits and ensuring compliance to effectively utilize available tax incentives [14][15] - It discusses the differences in tax treatment for domestic and foreign R&D expenses, highlighting the calculation of deductible amounts for both types [14][17] - The article outlines the process for foreign investors to report reinvestment information and the necessary documentation required for tax credit eligibility [17][20]