I am trying to generate a PO but I am receiving this error: "select an account for this transaction. However I am not seeing a drop down to select an account?

Hi there, floors.

I'll make sure you'll be able to create a Purchase Order (PO) in QuickBooks Online (QBO). 

When creating a purchase order in QuickBooks Online, let's make sure you've selected the Category or Item details and entered the necessary information.

If you've already selected the details and the issue persists, we can perform some basic troubleshooting steps to make sure the issue isn’t browser-related. It’s possible that local internet cache files are the reason for this unexpected behavior. 

Let's start accessing your account using a different or private browser. You can use either of these shortcut keys:

• Google Chrome: Ctrl + Shift + N
• Mozilla Firefox: Ctrl + Shift + P
• Microsoft Edge: Ctrl + Shift + P
• Safari: Command + Shift + N

Once in, try to generate PO. If it works, go back to your regular browser and clear its cache. This is done to speed up the process the next time you do a transaction in QuickBooks Online. Also, an alternative way is to use other compatible browsers.

Additionally, I've added this page on how to create a purchase order and send them to suppliers: Create purchase order in QuickBooks Online.

Drop me a comment below if you have any other questions about generating PO in QBO. I'll be happy to help you some more. Take care!