Shows how to use the wootax_local_delivery_methods filter to register a custom delivery method.

functions.php

/**
 * Register the Custom Local Delivery method with WooTax
 */
function wootax_add_local_delivery_method( $methods ) {
  $methods[] = 'custom_local_delivery'; // Detected on frontend
  $methods[] = 'Custom Local Delivery'; // Detected on backend
  
  return $methods;
}

add_filter( 'wootax_local_delivery_methods', 'wootax_add_local_delivery_method', 10, 1 );