- next unless $old->getfield('tax') ne $cgi->param("tax$taxnum");
- my(%hash)=$old->hash;
- $hash{tax}=$cgi->param("tax$taxnum");
+ my $exempt_amount = $cgi->param("exempt_amount$taxnum");
+ next unless $old->tax ne $cgi->param("tax$taxnum")
+ || $old->exempt_amount ne $exempt_amount;
+ my %hash = $old->hash;
+ $hash{tax} = $cgi->param("tax$taxnum");
+ $hash{exempt_amount} = $exempt_amount;