If your invoice has been accepted by us but you decided to return or exchange the item, delete the item in the app and generate a new tax-free form.
If you decide to return a particular item after receiving a VAT refund, you will need to see Customs officers yourself when crossing the border on your next visit and show the Airvat tax-free form.
Customs will collect the required VAT from you and issue a receipt. Only after completing this procedure, can you return the item to the store and receive a refund.