3000 invoices can be tax-deductible 435.90 yuan. However, the premise is that this invoice is a special VAT invoice, so the tax rate is 17%, and the tax amount of 3000 ÷ (1+17%) x17% = 435.90 yuan can be directly deducted. If you are an ordinary taxpayer, you can only get an ordinary invoice, so you can't use it for tax deduction.

First, the role and significance of invoices

Invoice is very important. Many people will choose to invoice after buying large items in the supermarket. Because invoices play an important role in China's social and economic activities. First of all, invoice has the characteristics of legality, authenticity, unity and timeliness, so it is also one of the most basic accounting original vouchers. Secondly, the invoice is also a carrier to record the content of economic activities and an important tool for financial management. It is also an important basis for tax authorities to control tax sources and collect taxes. Most importantly, invoices are an important means for the state to supervise economic activities, maintain economic order and protect national property security. So be sure to let the merchants invoice themselves, so that if there is any quality problem with the goods they buy, they can make compensation with the invoice. Some people have not issued invoices or lost invoices after purchasing goods. If the goods have quality problems, the merchants will directly refuse to pay compensation.

Second, about invoices.

Invoice refers to the business vouchers issued and collected by all units and individuals in buying and selling goods, providing or receiving services and engaging in other business activities. However, it should be noted that the receipt is the receipt of payment, and the invoice can only prove that the business has occurred, but not whether the payment has been received. Simply put, an invoice is the original proof of the cost, expense or income incurred. For the company, the invoice is mainly the basis for the company to make accounts, and it is also the expense certificate for paying taxes; For employees, invoices are mainly used for reimbursement. There are many kinds of invoices, which are mainly classified according to the characteristics of the industry and the taxpayer's production and operation projects, and each invoice has a specific scope of use.

To sum it up. Invoicing is very important. If you don't invoice after buying something, then businesses can also use it to evade taxes, but paying taxes is the obligation of every citizen, so you must ask for an invoice.