Welcome aboard to the Community, @tery.
I'm here to share some information about Projects in QuickBooks Online.
The feature helps organize all job-related information in the account in one place. You can add certain transactions such as estimates, invoices, expenses, bills, purchase orders, or time.
Since PO is a non-posting transaction, projects won’t be able to track it as an expense unless you convert it to a bill. Take a look at this article for reference: Set up and use Projects feature.
Here are also other related articles for more information:
That should answer your question for today.
Hit the Reply button below if you need anything else. I’m always here to help. Take care!