Hi km-lucas-bigpond,
Thanks for posting in the Community! Just to check, are you trying to view your customer's transaction history? If yes, you can follow these steps.
- Go to Get paid & pay and select Customers.
- Select a customer on the list.
- See transactions created for the selected customer in Transaction List.
If you prefer to see all sales transactions, go to Bookkeeping and then select All sales.
You can also check this article for your reference: Understand the navigation menu in QuickBooks Online.
Feel free to drop a comment below if you have any other questions. I'm here to help.