1. Log in to Baiwangyun for invoicing: Open Baiwangyun's invoicing webpage or mobile App, and log in with your account and password.

2. Enter the setting interface: find the "Settings" or "My Settings" option on the home page or menu bar, and click Enter.

3. Find billing settings: in the settings interface, find and click related options, such as billing settings or invoice settings.

4. Invoice Type Selection: On the billing setting page, you will see an option of invoice type, usually the toggle button of "special ticket" and "ordinary ticket".

5. Switch invoice type: click the switch button next to the invoice type option to select the invoice type you need. If "Special Ticket" is currently displayed, switch to "Ordinary Ticket" and vice versa.

6. Save Settings: After switching invoice types, remember to click Save or confirm the save settings at the bottom of the page. Baiwangyun Invoice is an electronic invoice management software.