Hello and good day, juliayoungmm.
You can customise the Customer Balance Detail report and add the column for the Purchase Order numbers.
Here's how:
- Go to Reports on the left panel.
- Type Customer Balance Detail in the search field.
- Select the Report period, and then click the Customize button.
- In the Customize report window, click the Rows/Columns drop-down.
- Select the Change columns link, and put a check mark on the PO numbers box.
- Hit the Run report button.
I'm also adding these article that you can use for future reference:
Feel free to comment on this thread if you need anything else. Take care!