Taxes, which are imposed by Government, should be differentiated from charges, which are imposed by airports, airlines or other agencies. There are no Government taxes levied on flights out of Ireland. However, I am aware that other countries, including the United Kingdom, impose these taxes.
Different airlines have different policies on refunds with regard to taxes and charges and some airlines impose an administration charge in respect of an application for a refund.
Essentially this is a consumer issue and would be a matter for the National Consumer Agency, a body which is within the remit of my colleague the Minister for Enterprise Trade and Employment.