As you can see profile edit page have various tabs like Basic settings. You may add custom tab like Bio component have own edit tab on profile edit page.

<?php
function my_component_init(){
		ossn_add_hook('profile', 'edit:section', 'my_component_hook');
		//you also need to register menu item
			ossn_register_menu_item('profile/edit/tabs', array(
				'name' => 'bio',
				'href' => '?section=bio',
				'text' => ossn_print('bio'),
			));		
}
function my_component_hook($hook, $type, $return, $params){
		//$params['section'] contain the section type example 'edit'
		//$params['user'] contains user instance
		if($params['section']  == 'bio'){
			return 'bio section contents';	
		}
}
ossn_register_callback('ossn', 'init', 'my_component_init');