The ministry has begun looking into the deal that saw Kraft buy the historic British chocolate maker, including its Indian unit Cadbury India, for 19.6 billion dollars in February last year.
The ministry was asked to begin an investigation last month by the Delhi High Court in response to a case filed by a social activist who campaigns against corporate tax fraud, the Press Trust of India reported.
"I am directed to inform you that taking cognisance of the petition filed by you, action has been initiated in the matter under income tax laws," senior ministry official Salil Mishra said in a letter addressed to the activist.
The investigation echoes a similar Indian probe into a 2007 deal between Britain's telecom giant Vodafone and Hong Kong-based Hutchison Whampoa that saw Vodafone hit with a 2.
53-billion-dollar tax bill.
Vodafone had spent 11.1 billion dollars buying a 67-percent stake in Hutchison Whampoa's Indian mobile unit.
The British group, which says the tax bill i