Add custom fields to the invoice made with Checkout Field Editor for WooCommerce

Hi @marcoloprete

For adding custom fields on your invoice, please add the below code in your active theme’s functions.php file or use a plugin like Code Snippets:

function example_custom_order_fields( $fields, $order ) {
	$new_fields = array();
		
	if( get_post_meta( $order->get_id(), 'your_meta_field_name', true ) ) {
		$new_fields['your_meta_field_name'] = array( 
			'label' => 'VAT',
			'value' => get_post_meta( $order->get_id(), 'your_meta_field_name', true )
		);
	}
	
	if( get_post_meta( $order->get_id(), 'your_meta_field_name', true ) ) {
		$new_fields['your_meta_field_name'] = array( 
			'label' => 'Customer Number',
			'value' => get_post_meta( $order->get_id(), 'your_meta_field_name', true )
		);
	}
	
	return array_merge( $fields, $new_fields );
}
add_filter( 'wcdn_order_info_fields', 'example_custom_order_fields', 10, 2 );

Please let us know if you need any further help.

Regards,
Moksha.