This is Incredible BS from QBDT because there is no way to add an expense to be assigned to a customer to be retrieved when billing at a later date. The expense is only on the online version. You could create a Bill as I do (to myself) then you have tons of unpaid bills.

When I create an invoice yes you could add it but not ahead of time to be retrieved as an expense.

The above conversation is proof of the lack of the feature EXPENSE added at will.

Example: I am an architect and print a plot. I want to add the cost to the customer. this is an example of an expense QBDT can't handle it to be retrieved later when an invoice is created.