{$taxonomy}_term_new_form_tag
Action Hook: Fires inside the Add Tag form tag.
Source: wp-admin/edit-tags.php:443
taxonomy_parent_dropdown_args
Filter Hook: Filters the taxonomy parent drop-down on the Edit Term page.
Source: wp-admin/edit-tags.php:497
add_tag_form_fields
Action Hook: Fires after the Add Tag form fields for non-hierarchical taxonomies.
Source: wp-admin/edit-tags.php:525
{$taxonomy}_add_form_fields
Action Hook: Fires after the Add Term form fields.
Source: wp-admin/edit-tags.php:542