+
+ $param->{'tax_override'} =~ /^\s*([,\d]*)\s*$/
+ or $error .= "Illegal tax override " . $param->{"tax_override"} . " ";
+ my $override = $1;
+
+ if ( $param->{'taxclass'} eq '(select)' ) {
+ $error .= "Must select a tax class. "
+ unless ($conf->config('tax_data_vendor') &&
+ ( $override || $param->{taxproductnum} )
+ );
+ $cgi->param('taxclass', '');
+ }