It can be inquired on the website authorized by the State Taxation Bureau, and the electronic invoices issued by different regions can be inquired on the websites of provincial and municipal tax bureaus respectively. Enter the invoice code, invoice number and anti-counterfeiting code in the relevant website, and then click the "Check" button at the bottom to verify this electronic invoice.

1. Go to the know-it-all APP and click on more services.

2. Click on the tax service in the toolbar on the left.

3. Click on the invoice query.

4. Fill in relevant information.

5. Click Query.