How to Create WooCommerce Refunds Programmatically | ibenic.com/how-to-create-woocommerce-refunds-programmatically

refund_order.php

<?php

/**
* Process Order Refund through Code
* @return WC_Order_Refund|WP_Error
*/
function ibenic_wc_refund_order( $order_id, $refund_reason = '' ) {
  $order  = wc_get_order( $order_id );

  // IF it's something else such as a WC_Order_Refund, we don't want that.
  if( ! is_a( $order, 'WC_Order') ) {
    return;
  }
  
  // Get Items
  $order_items   = $order->get_items();
  
  // Refund Amount
	$refund_amount = 0;

  // Prepare line items which we are refunding
  $line_items = array();

	if ( $order_items = $order->get_items()) {

    foreach( $order_items as $item_id => $item ) {

      $item_meta 	= $order->get_item_meta( $item_id );
 
			$product_data = wc_get_product( $item_meta["_product_id"][0] );

			 
      $item_ids[] = $item_id;
      $tax_data = $item_meta['_line_tax_data'];
      $refund_tax = 0;

      if( is_array( $tax_data[0] ) ) {

        $refund_tax = array_map( 'wc_format_decimal', $tax_data[0] );

      }

      $refund_amount = wc_format_decimal( $refund_amount ) + wc_format_decimal( $item_meta['_line_total'][0] );

      $line_items[ $item_id ] = array( 'qty' => $item_meta['_qty'][0], 'refund_total' => wc_format_decimal( $item_meta['_line_total'][0] ), 'refund_tax' =>  $refund_tax );

		 
			}
		}
  
		$refund = wc_create_refund( array(
			'amount'         => $refund_amount,
			'reason'         => $refund_reason,
			'order_id'       => $order_id,
			'line_items'     => $line_items,
			'refund_payment' => true
		) );

		return $refund;
}

refund_order1.php

<?php

/**
* Process Order Refund through Code
* @return WC_Order_Refund|WP_Error
*/
function ibenic_wc_refund_order( $order_id, $refund_reason = '' ) {
  
  $order  = wc_get_order( $order_id );

  // If it's something else such as a WC_Order_Refund, we don't want that.
  if( ! is_a( $order, 'WC_Order') ) {
    return new WP_Error( 'wc-order', __( 'Provided ID is not a WC Order', 'yourtextdomain' ) );
  }
  
	if( 'refunded' == $order->get_status() ) {
		return new WP_Error( 'wc-order', __( 'Order has been already refunded', 'yourtextdomain' ) );
	}
	
  
  // Get Items
  $order_items   = $order->get_items();
  
  // Refund Amount
	$refund_amount = 0;

  // Prepare line items which we are refunding
  $line_items = array();
  
  // Other code will go here
}

refund_order2.php

<?php

/**
* Process Order Refund through Code
* @return WC_Order_Refund|WP_Error
*/
function ibenic_wc_refund_order( $order_id, $refund_reason = '' ) {
  
  // ...
  
  if ( $order_items ) {
    foreach( $order_items as $item_id => $item ) {
      
      $item_meta 	= $order->get_item_meta( $item_id );
      
      $tax_data = $item_meta['_line_tax_data'];
      
      $refund_tax = 0;

      if( is_array( $tax_data[0] ) ) {

        $refund_tax = array_map( 'wc_format_decimal', $tax_data[0] );

      }

      $refund_amount = wc_format_decimal( $refund_amount ) + wc_format_decimal( $item_meta['_line_total'][0] );

      $line_items[ $item_id ] = array( 
        'qty' => $item_meta['_qty'][0], 
        'refund_total' => wc_format_decimal( $item_meta['_line_total'][0] ), 
        'refund_tax' =>  $refund_tax );
      
    }
  }
  
  // Order Items were processed. We can now create a refund
}

refund_order3.php

<?php

/**
* Process Order Refund through Code
* @return WC_Order_Refund|WP_Error
*/
function ibenic_wc_refund_order( $order_id, $refund_reason = '' ) {
  
  // ...
  $refund = wc_create_refund( array(
	'amount'         => $refund_amount,
	'reason'         => $refund_reason,
	'order_id'       => $order_id,
	'line_items'     => $line_items,
	'refund_payment' => true
	));

	return $refund;
}

I have a question about $refund_tax. I have orders that are digital downloads and have a VAT tax applied to them for certain European countries. When an order is refunded I also need the taxes to be refunded as well. The $refund_tax value is never set because $tax_data[0] is never an array. $tax_data is an array but not the first element. Is that the correct way to get the correct $refund_tax value or am I missing something?

if you ask him here the original sourch, may you get fast respons there,
https://www.ibenic.com/how-to-create-woocommerce-refunds-programmatically/