NASHVILLE (AP) — The Internal Revenue Service says it has over $17 million in unclaimed refunds for Tennessee residents who failed to file a 2012 tax return.

The law provides taxpayers with a three-year window to claim a refund, but those wishing to collect must file their 2012 returns no later than April 18.

There is no penalty for filing a late return that qualifies for a refund.

IRS spokesman Mark Green said in a news release that the estimated median unclaimed refund for tax-year 2012 in Tennessee is $702.

If no return is filed to claim a refund within three years, the money becomes property of the U.S. Treasury.

Tax forms and instructions are available at the IRS.gov website on the forms and publications page, or by calling 1-800-TAX-FORM.