When using the Copy to Purchase Order feature from within an Estimate , where do you need to turn on USE Purchase orders?

From expenses within the Accounts & settings.

Explanation:

When using the copy to purchase order feature within an estimate, to turn on USE purchase orders you navigate to expenses under accounts and settings. When you get to the accounts and settings you would see the feature that shows "Expenses" tab. In the Purchase orders section, select the edit icon. Turn on the Use purchase orders options.

account and settings, expenses, purchase order

Explanation:

okay lol !