Glad to hear from you here in the Community, AliciaR270.

Let me help you go over to your purchase order and get past the error message you're getting.

Purchase orders in QuickBooks Online do not affect any of your accounts; instead, they simply help you keep track of what you order.

You'll need to choose an account if you're using the Category details section. This way, you'll be able to save the purchase order without any errors.

You may find these articles helpful:

• How to use purchase order.
• How to add a preferred vendor and create a purchase order using that preferred vendor.

For account-related discussion, feel free to reach out to our QuickBooks Online Support.

1. Sign in to your QuickBooks Online Company.
2. Click (?) Help at the upper right corner.
3. Select Contact US on the pop-up.
4. Enter a brief description of your concern then hit Continue.
5. Click Get a callback.
6. Enter your contact information.
7. Select Call me.

You can always get back to me if you need more help with QuickBooks Online purchase orders. Have a nice day.