Connect with and learn from others in the QuickBooks Community.
I'd be glad to provide details about your concern, bayer368.
A purchase order is a non-posting transaction, and adding it after a bill is created is unavailable. What you can do is create a purchase order first and then copy it to the bill.
For more details about the process, you can check out these articles:
Please feel free to leave a reply on this thread if you have other questions or concerns. I'll be around to help you out again. Have a good day!