Updated: February 01, 2021 10:40 IST The British firm gave India its biggest onland oil discovery but exited the country after it was slapped with a тВ╣10,247-crore tax demand using a legislation that gave the government the powers to tax companies retrospectively Share Article AAA A Cairn India employee works at a storage facility for crude oil at Mangala oil field at Barmer in Rajasthan. Image for representation only. ┬а | Photo Credit: Reuters The British firm gave India its biggest onland oil discovery but exited the country after it was slapped with a тВ╣10,247-crore tax demand using a legislation that gave the government the powers to tax companies retrospectively