I understand the importance of making the PO # show in the Open Balance Report in QuickBooks Desktop (QBDT), Dav. 

As of the moment, the option to make the PO # shown as default in the Open Balance Report for a customer is still unavailable in QBDT. We don't know exactly when the feature will be implemented. However, we can forward your feedback to our Product Development team. To provide us with your insights about the feature you want to see in the program. 

You can follow the steps provided by my colleague above on how to submit feedback. You can also track feature requests through the Customer Feedback website.

I'll share this article so you can read it if you want to check the latest QuickBooks news and features: QuickBooks product updates.

Let us know if you require further assistance with your QuickBooks account. The Community team is here to help anytime. Have a great day!