【实用】精准把握政策界限，三类常见费用企业所得税前扣除请注意

Group 1 - The article focuses on the tax deduction policies for three types of expenses that are often confused, emphasizing the importance of correct categorization for tax compliance and burden [2][4][5] - For employee education expenses, costs incurred for employees pursuing degrees while employed should be borne by individuals and cannot be deducted as "employee education expenses" [3][4] - Regarding supplementary medical insurance, only payments made for active employees are eligible for tax deductions, while payments for retired employees do not qualify [6][7] Group 2 - In terms of R&D expenses, only innovative and uncertain activities can be classified for additional deductions, while routine upgrades and simple changes do not qualify [8][9] - The policy explicitly states that routine upgrades and simple modifications to existing products are excluded from the additional deduction policy [9]