Apple chief executive Tim Cook says the European Commission is "picking on" Ireland and that "no one did anything wrong", but is he right?
In two Irish interviews, Mr Cook hit back at the Commission's "maddening" ruling that Apple's tax benefits in the country are illegal.
He added that the €13bn (£11bn) tax bill Apple received was "political" and based on "false" numbers.
The BBC has looked at some of Mr Cook's key claims to see if they were fair.
The European Commission would obviously disagree.
Margrethe Vestager, the European Commissioner in charge of the case, stated that Ireland's selective tax treatment of Apple was "illegal under EU state aid rules". In other words, under EU law, Apple was given an unfair advantage over other businesses.
Apple has said it will appeal against the ruling to the European Court of Justice, and Ireland's Cabinet is due to decide on Friday if it will also appeal.
It will then be up to the EU's highest judges to decide if Apple and Ireland did anything wrong.