Speaking at the inauguration of the first Large Taxpayers Unit, Chidambaram said limited information was coming in the way to reach tax evaders but it would change.
A group of professionals was working on several innovative search engines, which would help in gaining information leading to unearthing of tax evaders, he added.
Chidambaram said a small number (of tax evaders) believe they are "clever" but that is no longer true. "We have more information than you (tax evaders) think we have."
The minister said the government is planning to open LTUs in Chennai, Mumbai, Delhi and Kolkata. Out of this, he expects one or two to commence operations before March. There are 830 entities eligible to join LTUs: 202 in Delhi, 282 in Mumbai, 132 in Chennai, 131 in Kolkata and 83 in Bangalore.
He said the cost of tax collection was the lowest in India at 0.67 per cent, and he expected it to drop to 0.64 per cent this year.
Chidambaram said it was necessary to bring about administrative and attitudinal changes and incorporate modern management principles into tax administration. "That's what we are trying to do".
