Senior IRS officer R K Tewari today took charge as the new chairman of the Central Board of Direct Taxes (CBDT), the apex authority of the Income-Tax Department.

Tewari, a 1976-batch Indian Revenue Service officer, was posted as the Member (Legislation and Computerisation) in CBDT.

Sudha Sharma retired on February 28.Tewari has earlier served in various positions in the I-T Department, including as a Chief Commissioner in the national capital.