GRA should aim to be world class tax administrator -Ashni Singh urges during visit Senior Minister in the Office of the President with responsibility for Finance, Dr. Ashni Singh (left) at one of the GRA facilities. (GRA photo) December 17, 2020 Senior Minister in the Office of the President with responsibility for Finance, Dr. Ashni Singh yesterday called on the Guyana Revenue Authority (GRA) to aim to be a world-class tax administrator and he also warned against corruption. Singh yesterday made his first visit to GRA facilities since his recent appointment. A release from the Ministry of Finance said the visit occurred amidst the busy year-end clearance process and enabled the Minister to inspect the operations.