"There is no target for collection or declaration, but we are trying our best to communicate to tax evaders that it is their golden chance to evade action against them," Central Board of Direct Taxes (CBDT) Member Gopal Mukherjee told PTI.
"We have information about concealed transactions in our data warehouse and the number of them is 7.5 lakh. The tax department is issuing letters based on our intelligence information."
He was in city for promoting the scheme at the annual conference of Direct Taxes Professionals' Association.
Many of these transactions do not have PAN linked to them. The department has details of about 90 lakh such transactions for 2009-10 to 2016-17.
Mukherjee said parties receiving the letters will be offered a 15-day window to respond to whether he owns or disowns the transaction.