Here is an example of how you can add some text before the submit of the ticket form.  You can add this code to your theme’s FUNCTIONS.php file or to a custom plugin – a plugin is better since you wouldn’t lose changes when you switch themes.

add_action( 'wpas_submission_form_inside_before_submit', 'inside_before_test');

function inside_before_test() {

echo 'This is test output' ;

}