There are two ways to authenticate special VAT invoices. The first way is to directly take paper invoices to the tax bureau for authentication. The second is to scan the invoice, generate authentication documents and upload them to the national tax network for authentication. If you are going to the tax bureau for certification, you only need to take the deduction of the invoice to the tax bureau and take the number to wait for certification! If it is the second type, you need to buy a special invoice scanner, scan the invoice, generate authentication documents, and use CA to log on to the national tax network for online certification. Generally, it takes several hours to get the results, and whether the authentication has passed. If your company doesn't have many invoices, it's more convenient and faster to go to the tax bureau for certification. If you have an agency bookkeeping company, they did this job originally, so just let them come to the door to get the invoice certification! thank you