The Oman Tax Authority recently posted a reminder via X on the tax return deadlines for taxpayers whose fiscal year ended on 31 December 2025. For taxpayers subject to the standard 15% tax rate, the return deadline is 30 April 2026 (i.e., four months after year-end). For small businesses subject to the 3% flat tax rate, the deadline is 30 March 2026 (i.e., three months after year-end). Conditions for the flat tax rate include that registered capital does not exceed OMR 60,000, gross income d…