Group 1 - The article emphasizes the importance of updating personal income tax information when changing jobs, particularly regarding the special additional deductions [1][3][8] - It outlines the steps to check and update employment information in the personal income tax app, ensuring that the current employer is correctly registered for tax purposes [1][4][9] - The article highlights the need to select the current employer as the "withholding agent" for special additional deductions in the app to ensure proper tax deductions [3][8][9] Group 2 - The article discusses a tax policy that allows enterprises to deduct the cost of newly purchased equipment and instruments valued under 5 million yuan as a one-time tax deduction [13][14] - It specifies that this policy applies to equipment purchased between January 1, 2018, and December 31, 2027, and clarifies the conditions under which the deduction can be claimed [14][15] - The article explains the definition of "newly purchased" and the criteria for determining the unit value of fixed assets eligible for the deduction [16][22][30]