There will never be a shifting of taxation from X to Y! You have such a high tax because of your governments incompetence. That being said - I'm no fan of tha

There will never be a shifting of taxation from X to Y! You have such a high tax because of your governments incompetence. That being said - I'm no fan of that kind of tax avoidance, they should definitely pay their taxes. But what will happen until the EU has ruled on this (which can take many years), is that Italy will further reduce its competitive advantage because suddenly Italian corporations will be unable to buy Adwords, Facebook Ads and so on which should make them invisible to international customers. Good luck competing with a startup/small business that cannot buy any ads.