I can give you two reports, Tim34.
First is the Transaction List by Customer report. This will provide all sales transactions so we will customize it to show invoices only. Here's how:
You can memorize this report so you don't have to go over the same customization process again.
Second is the Open Invoices report. This will provide all open or unpaid invoices. Here's how:
If there's something else you need, please let us know. We're right here to help you out.