IS->retrieve_invoice(\%myconfig, \%$form);
$form->restore_vars(qw(payment_id language_id taxzone_id intnotes cp_id shipto_id));
$form->restore_vars(qw(taxincluded)) if $form->{id};
IS->retrieve_invoice(\%myconfig, \%$form);
$form->restore_vars(qw(payment_id language_id taxzone_id intnotes cp_id shipto_id));
$form->restore_vars(qw(taxincluded)) if $form->{id};