It depends on whether your local IRS (not local taxation bureau) is certified by hand or by machine. Generally, you need to carry the qualification certificate of VAT general taxpayer (there is an electronic tag behind the certificate, and you need to enter a password when authenticating the machine), the qualification certificate of VAT special invoice manager, and the invoice deduction form that needs to be authenticated.

As for how to authenticate, the most direct way is to go to the IRS to see how others operate. Just take a look. When to enter the password and how to issue the invoice, it is very simple to follow the prompts.

At present, the invoice certification cycle is 180 days, which does not mean that you have to certify in the month when you receive the invoice, but also depends on how many invoices you can issue in the month. This involves the question of how much tax to pay and when to pay it, but it must be certified within 180 days at the latest.

The general certification time is the penultimate working day from the beginning of the month to the end of the month, and the certification is generally only one morning on the last working day. For the sake of safety, the certification is carried out two days in advance. After the machine is certified, it will print a receipt for you, indicating the certified quantity and amount. Generally, there is no manual bill, and the input tax is declared according to the actual amount of certification at the time of tax declaration certification.