You could add tax and shipping information to your Authorize.Net SIM payment gateway. To do so, simply follow these steps:
1. Open ansimgateway.asp using a text editor (eg. Notepad).
2. Locate the following code:
(around line 96-97)
DofieldSIM "x_ship_to_country", orders("oshipcountry")
Closerecordset Orders
DofieldSIM "x_ship_to_country", orders("oshipcountry")
DofieldSIM "x_tax", orders("otax")
DofieldSIM "x_freight", orders("oshipcost")
Closerecordset Orders