Adding unbilled expenses to invoices
To add an expense to an invoice you will first need to associate that Expense with a Project. To do this simply select Rebill to Project when adding the Expense as shown below.
To then add your unbilled expenses to an invoice when you first add, or subsequently edit, the invoice you'll find fields on the form labelled 'Include Unbilled Items', 'Expenses and Estimates'.
From the 'Include Expenses' dropdown, you can choose to either include each expense on a separate line or to include them all on one line.
Including them on separate lines will add each expense as a separate invoice item. Including them all on one line will group together all expenses as one line item and all mileage claims (with the same mileage rate) as another line item..