Invoice not uploaded or registered: if the invoice is not uploaded to the authentication platform or the registration process is not completed, the relevant records will not be found when querying.
Incorrect information input: During the inquiry process, the wrong invoice number, date or other information may be entered, and related invoices may not be found.
Authentication platform problem: Sometimes, there may be technical problems or maintenance work on the VAT invoice authentication platform, which makes the query function temporarily unavailable.
Invalid or Certified Invoice: If the invoice has been certified or invalidated, relevant records may not be found when querying.
If you can't find the invoice, you can first confirm whether the invoice information is entered correctly, and then try to inquire later, or contact the relevant institutions or tax authorities for details.