The European Commission says Ireland improperly allowed Apple to avoid paying taxes on almost all profits from sales in the EU.
European tax authorities have been cracking down on U.S. tech firms who they say have not been paying their fair share of taxes in Europe.
A whistleblower has alleged the mutual-fund giant charged its funds below-market prices for advisory services to reduce its tax liability.
The company blames a "difference in interpretation of a tax rule" for the underpayment of taxes in China.
