all sales

Welcome to the Community, @45fab.

The All Sales page in your QuickBooks Online (QBO) account shows the different sales transactions you've made. Here, you can find your open invoices, customer payments, sales receipts, estimates (both accepted and pending), and credit memos. You can also see how much your customers owe you and how much they've paid. 

When recording your customers' payments, some come up as negative if you manually input an amount in the Amount received field. On the other hand, if you apply a customer's credit memo to an open invoice, you'll notice that the payment posts as a positive amount.

You can browse through this link for more information on invoicing and getting paid: Invoices and payments.

You might want to learn more about handling customer credits in QBO. Here's a guide you can check out: Create and apply credit memos or delayed credits in QuickBooks Online.

Feel free to come back to this thread if you have additional queries about your sales transactions. I'm happy to help out.