diff --git a/lib/Vend/Payment/AuthorizeNet.pm b/lib/Vend/Payment/AuthorizeNet.pm
index 745cc62..01b1182 100644
--- a/lib/Vend/Payment/AuthorizeNet.pm
+++ b/lib/Vend/Payment/AuthorizeNet.pm
@@ -270,7 +270,7 @@ package Vend::Payment;
 use strict;
 
 sub authorizenet {
-	my ($user, $amount) = @_;
+	my ($user, $amount, $shipping, $salestax) = @_;
 
 	my $opt;
 	my $secret;
@@ -398,6 +398,18 @@ sub authorizenet {
         $amount = Vend::Util::round_to_frac_digits($amount,$precision);
     }
 
+	if(! $shipping) {
+		$shipping = Vend::Interpolate::tag_shipping();
+		$shipping = Vend::Util::round_to_frac_digits($shipping,$precision);
+	}
+
+	$salestax = $opt->{salestax} if $opt->{salestax};
+
+	if(! $salestax) {
+		$salestax = Vend::Interpolate::salestax();
+		$salestax = Vend::Util::round_to_frac_digits($salestax,$precision);
+	}
+
 	my $order_id = gen_order_id($opt);
 
 #::logDebug("auth_code=$actual->{auth_code} order_id=$opt->{order_id}");
@@ -414,6 +426,11 @@ sub authorizenet {
 		x_Method => 'ECHECK',
 	);
 
+	my $tax_exempt = 'TRUE';
+	if($salestax > 0) {
+		$tax_exempt = 'FALSE';
+	}
+
     my %query = (
 		x_Test_Request			=> $opt->{test} || charge_param('test'),
 		x_First_Name			=> $actual->{b_fname},
@@ -436,6 +453,10 @@ sub authorizenet {
 		x_Phone					=> $actual->{phone_day},
 		x_Type					=> $transtype,
 		x_Amount				=> $amount,
+		x_Tax					=> $salestax,
+		x_Freight				=> $shipping,
+		x_PO_Num				=> $actual->{po_number},
+		x_Tax_Exempt				=> $tax_exempt,
 		x_Method				=> 'CC',
 		x_Card_Num				=> $actual->{mv_credit_card_number},
 		x_Exp_Date				=> $exp,