1. Visit to official website: First, open official website, Yunnan Provincial State Taxation Bureau. Official website must be used to ensure the accuracy of verification.

2. Enter the invoice verification page: find the entrance of VAT invoice verification in official website. Related links can usually be found on the home page or in the navigation menu.

3. Enter invoice information: after entering the invoice verification page, you need to enter the relevant information of the VAT invoice to be verified. Generally, you will be asked to enter the invoice code, invoice number, invoice date, etc.

4. Submit the verification request: after entering the invoice information, click Submit or Verify to submit the verification request to the system.

5. Waiting for verification result: the system will verify the invoice information you submitted and display the verification result on the page. You need to wait patiently for the system to process, usually only a few seconds or minutes.

6. Interpretation of verification results: Verification results usually show the authenticity information of invoices. If it is displayed as "valid", the invoice is true and valid. If it is displayed as "invalid" or other similar information, there may be something wrong with the invoice.

Please note that the above steps are general guidelines, and the specific operation process may be different due to the design and update of the website of Yunnan State Taxation Bureau. Therefore, before verifying the authenticity of the VAT invoice, it is best to visit the official website and consult the relevant operation guide to ensure that you follow the latest process for verification.

The above contents were carefully arranged by Zhu Bajie. Com, I hope I can help you.