Welcome to QuickBooks Community space, Sustainafricagroup. I'm glad to share about the non-posting transactions.
Non-posting transactions are saved in the system but do not contribute to the overall totals in reports. They do not affect the customer's balance. The non-posting transactions in QuickBooks Online include Estimates, Delayed Credit, Delayed Charges, and Expenses to be billed to a customer.
If you want to get the lists of non-posting transactions recorded in your books, you can run the Transaction List by Customer Report. Then, customise it to Non-Posting. Here's how:
Go to the Report menu and search for Transaction List by Customer.
Click the Customize button.
In the Filter section, tick the Transaction Type box. Then, select Non-Posting.
Feel free to reach out if you have further inquiries regarding the types of sales transactions in QBO. I'm here to provide the information you require.