A Constitutional Court decision, published in the Official Gazette dated 19 April 2024, concludes that Turkiye's "additional tax" conforms with the Constitutional Law in Turkiye.BackgroundTo raise tax revenue following a series of earthquakes in February 2023, the Turkish Parliament introduced a rule in March 2023 under Law No. 7440 that imposed a one-time additional 10% tax on certain exemptions and deductions applied for fiscal year 2022. The March 2023 law change generally requires corporate taxpayers to declare a 10% additional tax on their 2022 corporate income tax return, regardless of their corporation tax base, on (1) the amounts they claimed...