销售货物取得的延期付款利息如何计算缴纳增值税？

Group 1 - The article discusses the regulations regarding the calculation of taxable sales revenue under the Value-Added Tax (VAT) system in China, specifically stating that the sales revenue includes all payments received by the taxpayer except for the output tax [2] - It outlines the various types of additional fees that are considered part of the sales revenue, including handling fees, subsidies, penalties, and interest on delayed payments [2] - The article emphasizes that any additional fees collected from buyers, including late payment interest, should be treated as taxable income and included in the sales revenue for VAT calculation [3][2] Group 2 - The article references the Personal Income Tax Law, indicating that certain types of income, such as welfare payments and relief funds, are exempt from personal income tax [11] - It specifies that welfare payments are defined as living subsidies paid to individuals from funds retained by enterprises or organizations, while relief funds are provided by government departments to assist individuals facing financial difficulties [11] - The article clarifies that not all payments from welfare funds are tax-exempt, particularly those exceeding the stipulated limits or those that do not qualify as temporary living assistance [12]