Judgment of the Court (Fifth Chamber) of 26 February 2026.#European Commission v Kingdom of Belgium.#Failure of a Member State to fulfil its obligations – Article 258 TFEU – Directive (EU) 2016/1164 – Rules against tax avoidance practices that directly affect the functioning of the internal market – Article 8(7) – Computation of controlled foreign company income – Requirement to allow the taxpayer to deduct from his or her tax liability the tax paid by the controlled foreign company – Scope – Non-genuine arrangements which have been put in place for the essential purpose of obtaining a tax advantage – Failure to transpose.#Case C-524/23.