Hi there STucker1,

It's important that all your transactions be entered correctly for your books to be well balanced. QuickBooks Online is a great tool able to help you keep track of your sales and expenses so you can see the profit of your company. I can provide some information about classes and locations.

When it comes to expenses and bills, there can only be one location associated with the entire transaction, but a class can be added for each line of the transaction. I can see that this would be a feature that you'd like to see the ability to associate multiple locations to the same transaction as a feature in QuickBooks Online. I recommend leaving feedback in the system by clicking on the Gear icon, then Feedback. The comments made in that section are taken into consideration by our developers when designing new features for the software. 

If you have any other questions, feel free to reach out here.