This page will auto complete with most details from the Job Booking. You can change the Invoice Type if required. Also the Invoice Date is shown here and can be changed before you save.
Charges
This is where you need to add the charges for this invoice.
If you have completed the Cost page you can click "Get Costs" and select the cost(s) for this invoice. You can make any final changes, or click the selling rates button and select from default rates setup in BoxTop.
You can also add to the listing by clicking on the last empty box