Hello SR31T,

Welcome to the Community. Allow me to chime in and clarify things about creating an invoice from a billable expense in QuickBooks.

The feature mentioned above applies only to the old invoice layout in QuickBooks Online. For Desktop, you'll need to attach the receipts manually to your invoices.

Also, with QuickBooks Desktop's job costing tools, you can see how much money you spend and make for each job. I've attached an article you can use to learn more about how to ensure you have an accurate record of your job costs: Track job costs in QuickBooks Desktop. 

Comment below if you have additional questions about the QuickBooks features or customizing transactions. I'm always here to help. Take care always.