Can anyone explain why double entry accounting is used throughout Quickbooks apart from when you enter a bill and attach it direct to a customer account ?
I can provide an input why Quickbooks uses double-entry accounting, Afrance.
Our software uses this accounting method since it's the worldwide standard for business accounting. In this method, transactions record in at least two accounts. One as a debit, then the other as a credit.
entering a bill does use double entry accounting, the bill is a credit in accounts payable, and what ever the bill is for is usually an expense, a debit.
that you associate a customer and perhaps make it billable has nothing to do with it. Until you invoice the customer and bring the billable expense to the customer invoice that billable status is just a reminder.
If you'd like to know the breakdown of the recorded transactions, you can run the Journal report. It shows you the debit and credit of every transaction and what accounts are affected. Here's how to run it:
Go to the Reports menu.
Hover your mouse on Accountant & Taxes.
You can find more articles here in case you need help with other tasks in QuickBooks Desktop.
If you need help recording a specific transaction, please let me know. I'll be here to help. I also welcome any QuickBooks Desktop concerns you might have.