发票是人们在购销商品、提供或者接受服务以及从事其他经营活动中，开具、收取的收付款凭证。它既是消费者与商家进行交易的商事凭证，又是会计核算的原始凭证，也是税务机关稽查的重要依据。当今社会，大到跨国公司，小至街头店铺，只要从事经营活动，都要以发票作为交易... Invoice is the purchase and sale of goods, providing or receiving services and engage in other business activities, issued, received payment vouchers. It is not only the commercial evidence of the transactions between consumers and businesses, but also the original vouchers of accounting and also an important basis for the tax authorities to inspect. In today’s society, large multinational companies, small street shops, as long as engaged in business activities, must be invoiced as a transaction ...