Steps: Log in to the national VAT inquiry platform in State Taxation Administration of The People's Republic of China, People's Republic of China (PRC); (You can't paste the URL, just click Baidu) Enter the invoice code, invoice number, invoice date, invoice date, check code (or invoice amount) and verification code; Screenshot backup (at present, the electronic management of invoices is relatively perfect, and I personally think that screenshots can be directly used as attachments to accounting vouchers; Of course, it is not appropriate if it is used for reimbursement vouchers).