Hello,
Did you add the new field in
Site manager -> Development -> System tables ?
If so, you can refresh the invoice in CMSDesk if you want to see updated values (you can fill out the value with delay). I would recommend you creating a custom macro for the new field like:
Macro expressions. Then you can customize the layout of invoice in CMSDesk -> Tools ->
E-commerce -> Configuratio -> Invoice
The invoice which receives the customer by e-mail is customizable in
Site manager -> Development -> E-mail templates -> E-commerce - Order notification to customer .
Best regards,
Helena Grulichova