The CUSTOMER field is the customer that will be used for both the invoice and payments in your accounting system. A sample invoice is shown below with the Customer shown in red. If you do not select a customer to use, we will create a customer with the name:
"[Your Business Name] ([Your POS ID])". So, for example if your business name is "Abreeze Technology" and your POS ID is "ABC", then the default customer would be named "Abreeze Technology (ABC)".