Reuters is reporting that an advisor to the top court in the European Union stated on Thursday that the EU tribunal made errors of law when it ruled in favor of US tech titan Apple in a €13 billion ($14 billion) tax case.

EU Court of Justice (CJEU) advocate general Giovanni Pitruzzella said that the General Court ruling should be set aside by judges, and the ruling be sent back to the lower tribunal.

Pitruzzella said the General Court failed “to assess correctly the substance and consequences of certain methodological errors that, according to the Commission decision, vitiated the tax rulings.”

The EU’s General Court had sided with Apple in the landmark ruling in 2020. The ruling basically invalidated the declaration by the European Commission that the US company was granted an unfair advantage under Irish tax laws.

The ruling was a rebuke to European Competition Commissioner Margrethe Vestager, who has issued an order in 2016 to Apple to repay €13 billion in unpaid taxes to Ireland, following a decision that the nation had supposedly granted “undue benefits” to the company.

The claims were contested by both Apple and Ireland. Apple asserted that it never requested special treatment, and accused the European Union of attempting to rewrite history. Tim Cook, the CEO of Apple described the charges as “total political crap.”

It is expected the CJEU will issue its ruling on the case in the coming months, according to the Reuters report.