Hi there, JimA65.

Right now, when creating a statement, it will only show a summary of customers invoices, payments, credits, and balances. I know how adding the option to include a Purchase Order to statement could help your business. I'll be sure to submit feedback, which is sent to our Product Development Team when considering features to introduce in software updates. QuickBooks is constantly improving thanks to the ideas provided by users, like yourself.

You can check the create and view customers statements article to know more on how to use it. 

If you have any other questions concerning QuickBooks, let me know. I'm always around to help. Have a great day!