Shows how to register a custom pickup shipping method using the wootax_local_pickup_methods filter.

functions.php

/**
 * Register the Local Pickup Plus method with WooTax
 */
function wootax_add_local_pickup_method( $methods ) {
  $methods[] = 'local_pickup_plus'; // Detected on frontend
  $methods[] = 'Local Pickup Plus'; // Detected on backend
  
  return $methods;
}

add_filter( 'wootax_local_pickup_methods', 'wootax_add_local_pickup_method', 10, 1 );