Talha

if (isset($klaviyo_settings['klaviyo_subscribe_checkbox']))
{
 // Add the checkbox field
  add_filter('woocommerce_checkout_fields', 'kl_checkbox_custom_checkout_field', 11);

// Post list request to Klaviyo

    add_action('woocommerce_checkout_update_order_meta', 'kl_add_to_list');
}

This is how they add checkboxes at the end of billing_feild.
the use Filter function on ‘woocommerce_checkout_fields’ hook.

are you not using this hook in this plugin ????

• This reply was modified 2 years, 10 months ago by Talha. Reason: simplifies the code for better understand how they are using filter on checkout feilds