I wish you didn't have to go through all these hurdles with printing your vendor information in your purchase orders, @KAO2411. Let me share an alternative to fix this issue in QuickBooks Desktop (QBDT).

To sort this out, I suggest manually updating the vendor's full name in the purchase order transaction. Then, you can tap Yes to the prompt message, so all of your transactions related to that vendor will be updated. See the screenshot below for your visual reference:

However, if the issue persists after performing the steps above, I recommend reaching out to our Technical Support Team. They have the tools to securely look into your account and can do further investigation into this behavior.

Furthermore, you can check out this article to personalize the ready-made reports that outline the current state of spending and accounts payable for your business: Customize vendor reports.

I'm always around and ready to help if you have more questions about managing your vendor transactions in QBO. I'll be here to lend a helping hand.