After inquiring about the relevant information shows that the invoice header is not the same, can not be deducted, if the invoice content, such as the sales item is taxable labor, the input item is office supplies, normal deduction.
The invoice refers to all units and individuals in the purchase and sale of goods, provide or receive services and engage in other business activities, issued and received business vouchers, is the original basis for accounting, but also auditing authorities, tax authorities, an important basis for law enforcement inspections, receipts are only receipt and payment vouchers, invoices can only prove that the business occurred, can not prove that the money was received or paid.