The Internal Revenue Service has almost $1.3 billion in unclaimed 2005 tax refund money that is due to missing filers in each state, as well as in U.S. territories and to members of the military stationed worldwide.

Within U.S. borders, California has the most nonfiling residents — 154,500 — for the 2005 tax year. But within the country’s contiguous borders, errant New Hampshire filers are likely to get more money. The IRS says the median check in the Granite State comes to $667, meaning half of the taxpayers there can expect to get at least that much when they do file.

Military taxpayers are the biggest potential refund recipients of all. Half of the members of the armed forces who didn’t file 2005 returns could collect checks of around $800 by getting in their old forms by the coming April filing deadline.

State by state
Location Nonfilers Median refund amount
Alabama 21,400 $585
Alaska 6,100 $665
Arizona 36,900 $487
Arkansas 11,400 $547
California 154,500 $537
Colorado 23,700 $532
Connecticut 16,000 $659
Delaware 5,400 $592
District of Columbia 5,300 $564
Florida 99,300 $609
Georgia 44,400 $538
Hawaii 9,400 $639
Idaho 5,300 $464
Illinois 50,400 $640
Indiana 26,600 $624
Iowa 11,800 $587
Kansas 12,900 $555
Kentucky 14,600 $588
Louisiana 24,900 $594
Maine 4,900 $532
Maryland 30,600 $584
Massachusetts 29,600 $638
Michigan 45,100 $609
Minnesota 19,700 $531
Mississippi 12,200 $533
Missouri 26,000 $550
Montana 3,700 $509
Nebraska 5,900 $548
Nevada 18,300 $551
New Hampshire 5,500 $667
New Jersey 41,100 $646
New Mexico 9,400 $532
New York 76,800 $639
North Carolina 37,300 $515
North Dakota 2,000 $553
Ohio 44,600 $571
Oklahoma 17,000 $546
Oregon 21,000 $467
Pennsylvania 47,800 $623
Rhode Island 4,500 $610
South Carolina 16,000 $506
South Dakota 2,400 $602
Tennessee 21,900 $586
Texas 103,000 $624
Utah 8,300 $496
Vermont 2,300 $550
Virginia 40,200 $576
Washington 35,600 $624
West Virginia 4,900 $627
Wisconsin 16,900 $535
Wyoming 2,800 $649
Armed Forces 5,500 $800
U.S. possessions 200 $754

If you’re one of these nonfilers, you’ve got until April 15 to send in your 2005 return or you’ll forfeit your refund. You can call the IRS’ toll-free help line at (800) 829-1040 for assistance if you have additional questions about these undistributed refunds.