Adding invoice detail

Just wondering if its possible to have the cart include the shipping method chosen and the tracking number to the customers invoice???

How is it possible to print an invoice or a receipt to show that a customer has a zero balance (eg. they have paid for the item and the purchase is complete)

I have found that when you complete the transaction by choosing the drop down menu “complete” that I thought it should change the invoice to a zero balance or swap from an invoice to a fully paid receipt.

Is there a receipt button that I have missed.