Go to Settings - POS Integration.
In the Device Configuration tab.
Locating the printer profile ID
The printer profile ID can be found in the Lightspeed K-series back-office.
Log in to your Lightspeed K-series back-office.
Via Hardware - Printing Profiles.
Copy the part of the URL marked inside in the red box shown in the screenshot.
Paste the serial from the URL in the orderBilly back-office.
Save your changes!