Where can I enter a default address for warehouse on PO's?

Hello Annie3,

Glad to have you connect with us here. I'll be happy to show you how to edit the address that appears on your POs is QuickBooks.

The address that appears on your POs is the company address that can be found on your company settings. Here's how to edit it: 

1. Click on the Gear icon at the top.
2. Select Accounts and Settings. 
3. Click Company from the left menu.
4. Go to Address section and click the pencil icon.
5. Update the address and click Save. 
6. Click Done. 

I encourage to give the steps above a try and let me know how you make out. I'll be one message away in case you need anything else.