There are two WAYS you can generate Invoice using WTS technique:

One WAY of CREATING an invoice is assigning it directly with the orders that you are working on.
And the other way is to export the ORDER to QuickBooks and create the invoice there.

There are two ways you can generate Invoice using WTS technique:

One way of creating an invoice is assigning it directly with the orders that you are working on.
And the other way is to export the order to QuickBooks and create the invoice there.