HARTFORD, Conn. (AP) There's a potential financial windfall waiting for thousands of Connecticut taxpayers.

U.S. Sen. Richard Blumenthal said Friday that he's learned there is $13.4 million worth of unclaimed tax refunds from 2011 owed to Connecticut taxpayers.

Blumenthal says the bulk of that money is owed to people who didn't claim the federal Earned Income Tax Credit. In 2011, the credit was worth as much as $5,751.

According to the IRS, more than 13,400 Connecticut residents haven't yet filed their 2011 tax returns. Blumenthal said people need to know there is no penalty for filing a late tax return that qualifies for a refund.

Free income tax preparation is available at Volunteer Income Tax Assistance sites for individuals with household incomes of up to $53,000. Taxpayers can call 211 to find locations.