LUCKNOW, Dec. 7 -- Kamini Chauhan Ratan, a 1997 batch IAS officer, has been appointed new principal secretary, state tax. She had been awaiting posting since her return from a central deputation. An order to this effect was issued here on Saturday. Ratan served the state tax (commercial tax) department as the commissioner from January 2018 to January 2019. She returned to UP last month having served the petroleum and natural gas ministry as an additional secretary....