bbp_get_topic_tag_template()

function bbp_get_topic_tag_template() {
	$tt_slug   = bbp_get_topic_tag_slug();
	$tt_id     = bbp_get_topic_tag_tax_id();
	$templates = array(
		'taxonomy-' . $tt_slug . '.php', // Single Topic Tag slug
		'taxonomy-' . $tt_id   . '.php', // Single Topic Tag ID
	);
	return bbp_get_query_template( 'topic_tag', $templates );
}