WordPress at a glance
action is not described

woocommerce_settings_tabs_(current_tab) action-hook . WC 1.0

Usage

add_action( 'woocommerce_settings_tabs_(current_tab)', 'action_function_name_7141' );
function action_function_name_7141(){
	// action...
}

Where the hook is called

In file: /includes/admin/views/html-admin-settings.php
woocommerce_settings_tabs_(current_tab)
woocommerce/includes/admin/views/html-admin-settings.php 41
do_action( 'woocommerce_settings_tabs_' . $current_tab ); // @deprecated 3.4.0 hook.

Where in WP core the hook is used WooCommerce

woocommerce/includes/admin/settings/class-wc-settings-page.php 40
add_filter( 'woocommerce_settings_tabs_array', array( $this, 'add_settings_page' ), 20 );
woocommerce/includes/admin/settings/class-wc-settings-tax.php 31
add_filter( 'woocommerce_settings_tabs_array', array( $this, 'add_settings_page' ), 20 );