Online certification generally refers to special VAT invoices, goods from online certification and transport invoice.

It means that the taxpayer connects the special VAT invoice deduction link and freight invoice deduction link with the main information through the special invoice scanner, including the invoice code, invoice number, buyer's taxpayer identification number, invoice date, amount, tax amount, 84-bit ciphertext (not necessarily 84-bit, for example, 84-bit) on the invoice, seller's taxpayer identification number and other information, which is converted into electronic information and transmitted to the national tax authorities through the Internet. An authentication method in which the 84-bit ciphertext is decrypted and restored by the anti-counterfeiting and tax-control authentication subsystem of the national tax authority, and automatically compared with the invoice plaintext to generate an authentication result, and the authentication result is sent back to the taxpayer.

The input tax that needs to be deducted in the current month is certified in the current month; Overdue certification, no points will be deducted. The current certification cycle is 180 days.