def returned(options = {})
      options = { returned_date: Date.today }.merge(options)
      request_params = {
        'orderID' => order_id,
        'cartItems' => { 'CartItem' => cart_items.map(&:to_hash) },
        'returnedDate' => xml_date(options[:returned_date])
      }

      response = TaxCloud.client.request :returned, request_params
      TaxCloud::Responses::Returned.parse response
    end
def returned(options = {})
      options = { returned_date: Date.today }.merge(options)
      request_params = {
        'orderID' => order_id,
        'cartItems' => { 'CartItem' => cart_items.map(&:to_hash) },
        'returnedDate' => xml_date(options[:returned_date])
      }

      response = TaxCloud.client.request :returned, request_params
      TaxCloud::Responses::Returned.parse response
    end
Marks any included cart items as returned.

 === Options
 [returned_date] The date the return occured. Default is today.