Where do I assign an account to enter a bill?

Welcome to the thread, @assign an account to enter a bil.

Let me get the help you need when entering a Bill. 

The Expense at the far left that @NOT MY USER ID is referring to is the Expense tab that you can see in the Bill page. For your visual reference, see below screenshot:

To learn more about how the Bill feature works in QuickBooks Desktop, you can consider checking below articles:

• Enter bills
• Void or delete a bill or bill payment check
• Pay bills in QuickBooks Desktop

I'm always here for you if you have any other questions, just leave a comment below. Have a great day!