WOODBURY - Families impacted by the 9/11 terror attacks may be missing out on a major tax break.

A law that was passed just months after the attacks made disability income resulting from terrorism non-taxable.

That means thousands of first responders who contracted illnesses working on the site and the families of those killed can legally claim $10,000 or the last three years of taxes paid.

The problem, though, is that many first responders and their families didn't know about it.

Senator Kirsten Gillibrand's office is pressing the IRS to be more upfront about the credit.