Sources said the cases have been filed in courts in Delhi, Mumbai, Bangalore, Ahmedabad and Goa before the closure of the just concluded financial year 2014-15 on March 31.
A report in this regard has also been sent to the Special Investigation Team (SIT) on black money which is now compiling all the figures and data to present an action taken report before the Supreme Court on or before May 12.
"About 121 cases have been filed before the March 31 deadline as after this time period these cases would have got time-barred and thus could not be legally prosecuted by the department.
The total undisclosed income brought to book in this particular case is approximately Rs 4,800 crore till now," the sources added.
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The I-T department has been probing 240 HSBC cases where it is suspected that Indians have stashed their illicit funds abroad.
Out of the said 628 people, 200 were either non-residents or non-traceable, leaving 428 cases to be actionable for tax sleuths to probe.
For these 428 actionable cases, the government had said, the net amount of peak balance was about Rs 4,500 crore.
Details of more than 1,000 suspected account holders from India, were claimed to have been disclosed through a joint investigation by an international body --the International Consortium of Investigative Journalists.
The entire HSBC list features names of 1,668 Indians while the number of actionable cases stands at 1,195 after taking into account duplication and other factors.
Collectively, these accounts had a balance of USD 4.1 1 billion (Rs 25,420 crore) till 2007.
In the list published early this year, there are 2,699 accounts linked to 1,688 Indians.