How to automaticly get the value from a custom field in sale order form to a filed in invoice form?
I use the developer mode in openerp 7 so i can create some fields that are needed. I 've created a char field in the sale order form (x_duty). Is there any way to create another field in the account.invoice.form so it automaticly gets the value of the x_duty field from the sales order form?
Thank you in advance