8月份的工资，9月份发，个人所得税应该在哪个月申报？

Core Viewpoint - The article discusses the tax deduction policies for corporate income tax in China, detailing what expenses can be deducted and the requirements for tax deduction certificates [9][10][11]. Summary by Sections Tax Deductible Expenses - Costs that can be deducted include raw material costs, manufacturing expenses, and other operational costs for industrial and commercial enterprises [9]. - Expenses are categorized into sales expenses, management expenses, and financial expenses, with specific rules for deductibility, such as business entertainment expenses being deductible at 60% but capped at 0.5% of annual sales revenue [9][10]. Non-Deductible Expenses - According to the Corporate Income Tax Law, certain expenditures are not deductible, including dividends paid to investors, corporate income tax, fines, and sponsorship expenses [11][12]. Tax Deduction Certificates - Tax deduction certificates are classified into internal and external certificates, with internal certificates being self-made documents for accounting purposes and external certificates including invoices and tax payment receipts [12][13]. - Companies must obtain these certificates before the end of the corporate income tax settlement period, typically by May 31 of the following year [12]. Retroactive Deductions - If a company fails to obtain the necessary tax deduction certificates in previous years, it can still claim deductions in subsequent years, provided the certificates are obtained within five years of the original expense [13].