Comment by ensignavenger

I read through the first part of the ruling to get a better idea of what happened. Apparently, Apple wrote to the Irish tax authorities, and said "this is how we plan to calculate our taxes" and the Irish tax authority said "okay, no problem, that works for us" and the EU commission investigated some years later, and said "wait, was that method of calculating taxes available to all Irish companies? We don't think so, so now Ireland has to collect taxes from all the way back many years." Ireland said "no bro, we're all good, they don't owe us anything", and Apple said "wait, we just did what we were told to do, and we already paid taxes on that income in the US instead of the EU, you can't retroactively change the rules" and the EU top court just said "Sorry, those tax rules go against EU law, and yes we can"