Woocommerce checkout field
Try : add_filter( ‘woocommerce_checkout_fields’ , ‘custom_override_checkout_fields’ ); function custom_override_checkout_fields( $fields ) { if(is_user_logged_in()){ unset($fields[‘billing’][‘billing_email’]); } return $fields; } Source : https://docs.woocommerce.com/document/tutorial-customising-checkout-fields-using-actions-and-filters/