Customers are the source of your income. Each customer you sell to must be registered as a customer. Customers hold the information that is required to create and send invoices.
Create a customer
Check out Create a customer to complete these steps.
Top questions, answered by our team
How can I mark an invoice as paid?
To mark an invoice as paid, do the following:
Go to the Invoices list.
Choose Mark as Paid.
Enter the amount you've received.
Save the invoice.