doolezah on "How to add an action when new category or taxonomy tag is created"

All,

In the latest version of WordPress (4.3.1), how do I add an action/filter after the Add New Category or Add New <taxonomy_category> is clicked in the Dashboard? I have looked at the Plugin/API reference (http://codex.wordpress.org/Plugin_API/Filter_Reference), and all the entries that look like they would work here are in red and no details or examples exist. I would appreciate the help.

Thanks!