// -------------------------------
// 1. First, hide the tab that needs to be merged/moved (edit-address in this case)
add_filter( 'woocommerce_account_menu_items', 'bbloomer_remove_address_my_account', 999 );
function bbloomer_remove_address_my_account( $items ) {
unset( $items['edit-address'] );
return $items;
}
// -------------------------------
// 2. Second, print the ex tab content (woocommerce_account_edit_address) into an existing tab (woocommerce_account_edit-account_endpoint). See notes below!
add_action( 'woocommerce_account_edit-account_endpoint', 'woocommerce_account_edit_address' );
// NOTES
// 1. to select a given tab, use 'woocommerce_account_ENDPOINTSLUG_endpoint' hook
// 2. to print a given tab content, use any of these:
// 'woocommerce_account_orders'
// 'woocommerce_account_view_order'
// 'woocommerce_account_downloads'
// 'woocommerce_account_edit_address'
// 'woocommerce_account_payment_methods'
// 'woocommerce_account_add_payment_method'
// 'woocommerce_account_edit_account'