Summary:

- The European Union's General Court has ruled against Apple in a long-running tax dispute with the European Commission. The EU court upheld the Commission's 2016 decision that Apple must pay back 13 billion euros ($13.8 billion) in unpaid taxes to Ireland.

- The case centered around Apple's tax arrangements in Ireland, where the company had set up two Irish subsidiaries that reported the majority of their profits to a "head office" that was not tax resident anywhere. The EU Commission argued that this allowed Apple to pay an effective corporate tax rate of 0.005% on its European profits in 2014.

- The ruling is a significant setback for Apple, which had fought the EU's tax order for years. The company now has the option to appeal the decision to the EU's highest court, the European Court of Justice.