In the LobbyPMS POS you can ad an additional custom charge to a customers bill. These extra charges can be added for services or products that are not already set up in the system.
In the POS screen, click on Add additional charge to open a new window as shown in the image below.
It is here you select the customer who will be charged, the total value and a description of the service/product. You are able to add tax to this charge before finally registering payment.