Editing an Order
How can we edit an Order to add the Tax and modify the total ?
In the payment module of Vantage, I have not set the Tax Rate because in Canada, we have different Tax rates per province. So, when someone wants to pay via Bank Transfer or Check, I need to calculate the tax for then and send them that information before they issue the payment.
So, how can I then Edit the Order to add the Tax Rate and the Total of Tax and modify the Total amount ?
Thanks for your help...