Hi Pavanpavanmehta, hope I have understood the question – if a return is submitted late and this is for the second or third time within the default period then the default period is again extended. If however a refund is due then there is no late payment of VAT so there is no default surcharge to pay. This is a very unlikely scenario and I would recommend that you focus your attention on more core subject areas at this point in your revision, Good luck in the exam