President of the European Commission Jean-Claude Juncker listens at a news conference during the European Union Tallinn Digital Summit in Tallinn, Estonia, September 29, 2017. REUTERS/Ints Kalnins TALLINN (Reuters) - The European Commission will propose new rules next year to ensure that the online sector pays its fair share of taxes, its president Jean-Claude Juncker said on Friday. Critics say online firms such as Google (GOOGL.O) or Facebook (FB.