The name, unit price, quantity, amount, tax rate, tax amount and other information of the product or service. Extended warranty value-added service is a value-added service provided when purchasing some large home appliances, automobiles and other products. According to the tax law, the name, unit price, quantity, amount, tax rate, tax amount and other information of the goods or services should be clearly stated. Among them, The name of the goods or services should be detailed and clear to facilitate consumers' identification and understanding; the unit price and quantity should be based on the actual transaction; the amount should be the unit price times the quantity, and the tax amount should be the amount times the tax rate. Due to differences in tax law regulations and implementation in different regions, you can consult the local tax department or professional agency when issuing an invoice to ensure that the invoice issuance complies with relevant regulations and standards.