storedocumentreturntable.php

См. документацию.

<?php
 
namespace Bitrix\Catalog\Document\Type;
 
use Bitrix\Catalog\StoreDocumentTable;
 
class StoreDocumentReturnTable extends StoreDocumentSpecificTable
{
    public static function getType(): string
    {
        return StoreDocumentTable::TYPE_RETURN;
    }
}