Let me guide you in running a report to show your customer's open balance with positive amounts, @Muganga.

Please know that the negative balance in the Customer Balance Detail report is the default. As a workaround, we can run the Transaction List by Customer report.

Here's how:

1. On the left panel, click Reports.
2. Search for Transaction List by Customer report.
3. Click the Filter icon, then modify it. I suggest looking at the screenshots below for better understanding.
4. Click the Columns dropdown, then select Open Balance.

Here are the screenshots for your visual reference:





 

Please note that this method only applies to invoices. If you want to include transactions such as Payments and Credits, the negative amounts will also be included in your report. With this, I recommend exporting the report and manually removing the negative amounts.

Moreover, you can check out this article to help you customise your report: Customise reports in QuickBooks Online.

Let me know if you need further assistance customising your report. Keep safe.