It looks like ETIAS application needs to be filled out/purchased for our upcoming trip. We are planning to go to Portugal, but like all of our travel plans things can change, for instance as of today our daughter might be able to vacation with us and our destination may change? I started to fill out the form on the ETIAS website and it asks for destination, I could click Portugal, but what if our destination changes? It doesn't offer a "Schengen" option and I read to be accurate when filling out the form. Once approved it appears to be valid for 3 years, do I just pick a country to get the approval and then it's valid for all Schengen destinations? Thanks for any advice!