LONDON (AP) — Ireland says it will begin collecting more than 13 billion euros ($15.9 billion) of back taxes from Apple, 19 months after the European Commission ruled that a tax deal with the tech giant amounted to illegal state aid. The Commission ordered Ireland to collect back taxes for the years 2003-2014, which it estimated at 13 billion euros plus interest. Ireland disagreed, saying the ruling undermined the integrity of the country's tax system.