DTA between Oman and Portugal signed

The Oman Tax Authority (OTA) has launched the "Fawtara" platform, initiating the phased introduction of electronic invoicing across the country. The system aims to improve the collection and monitoring of transactional data and standardise

The Oman Tax Authority (OTA) has reminded taxpayers of the filing deadlines for the 2025 fiscal year. Taxpayers subject to the standard 15% income tax rate must submit their returns by 30 April 2026, four months after the fiscal

Portugal’s Supreme Administrative Court has ruled that foreign-source income is generally liable for municipal surcharge unless it can be attributed to a foreign permanent establishment. The judgment, issued on 25 February 2026, followed a case

According to an OECD update, Montenegro, Oman, Panama, Peru, Rwanda, and Uruguay signed the Multilateral Competent Authority Agreement on Automatic Exchange of Information under the Crypto-Asset Reporting Framework (CARF MCAA) and the Addendum to

Portugal’s Tax and Customs Authority has issued Circular Letter No. 20288/2026 on 2 February 2026, outlining municipal surcharge (derrama municipal) rates applicable to corporate taxable profits for the 2025 fiscal year. The circular specifies

Austria and Oman signed an income and capital tax treaty on 28 January 2026. The agreement seeks to prevent double taxation and fiscal evasion between the two nations. The treaty will enter into force after the exchange of ratification