I can show you how to create an invoice, Shetland.

You can follow these steps:

1. Go to the Plus (+) icon and select Invoice.
2. Select the customer's name from the Customer drop-down.
3. Enter other necessary information.
4. Select Save and close.

In addition, this article will guide you on how to record a customer payment.

Please let me know if you have other concerns about invoices. Have a wonderful day!