I am currently working on a theme WordPress for a particular type of user and wanted to add a default set of terms to the custom post type that I am creating.
If this is you also then you need to use the wp_insert_term() function to achieve this.
An example. I wanted to add the term ‘Variable’ to the custom taxonomy ‘constructs’, so I use
wp_insert_term( 'Variable', 'constructs', array('description'=> 'my term description''slug' => 'variable' 'parent'=> 0 ) );