WASHINGTON (AP/NEXSTAR) — The IRS is warning taxpayers that they might be leaving more than $1 billion on the table.

The federal tax collector said that roughly 940,000 people in the U.S. have until May 17 to submit tax returns for unclaimed refunds for tax year 2020, which total more than $1 billion nationwide.

“We want taxpayers to claim these refunds,” IRS Commissioner Danny Werfel said in a statement, “but time is running out for people who may have overlooked or forgotten about these refunds.”

The average median refund is $932 for 2020. Texas, California, Florida and New York have the largest amount of people potentially eligible for these refunds. The table below shows how many people in each state may still be entitled to a 2020 tax refund, based on IRS estimates:

State or districtEstimated number of individualsMedian potential refundTotal potential refunds (excluding credits)
Alabama15,200$926$16,839,800
Alaska3,700$931$4,335,300
Arizona25,400$871$26,939,600
Arkansas8,700$923$9,392,600
California88,200$835$94,226,300
Colorado18,500$894$20,109,900
Connecticut9,800$978$11,343,600
Delaware3,600$945$4,156,500
District of Columbia2,900$968$3,503,800
Florida53,200$891$58,210,500
Georgia36,400$900$39,175,600
Hawaii5,200$979$5,972,600
Idaho4,500$761$4,369,600
Illinois36,200$956$40,608,000
Indiana19,200$922$20,893,000
Iowa9,600$953$10,601,700
Kansas8,700$900$9,285,600
Kentucky10,600$920$11,236,300
Louisiana15,100$957$17,357,300
Maine3,800$923$4,030,200
Maryland22,200$991$26,365,400
Massachusetts21,800$975$25,071,800
Michigan34,900$976$38,274,800
Minnesota13,500$818$14,043,900
Mississippi8,100$861$8,685,000
Missouri19,500$893$20,803,400
Montana3,400$851$3,632,100
Nebraska4,700$901$5,007,300
Nevada10,200$890$11,143,900
New Hampshire4,200$982$4,923,100
New Jersey24,400$920$27,408,300
New Mexico6,500$868$7,032,700
New York51,400$1,029$60,837,400
North Carolina27,500$895$29,304,100
North Dakota2,200$953$2,482,600
Ohio31,400$909$32,939,900
Oklahoma14,300$902$15,566,900
Oregon15,300$847$15,857,800
Pennsylvania38,600$1,031$43,412,900
Rhode Island2,600$986$2,980,500
South Carolina11,900$840$12,564,900
South Dakota2,200$892$2,346,300
Tennessee16,800$909$18,007,000
Texas93,400$960$107,130,200
Utah7,800$836$8,191,700
Vermont1,700$911$1,818,600
Virginia25,900$914$28,944,600
Washington26,200$976$31,110,300
West Virginia3,800$950$4,130,400
Wisconsin11,800$837$12,139,400
Wyoming2,100$961$2,416,300
Totals938,800$932$1,037,161,300
Source: IRS

How to claim your refund

For people who need to file a return, the IRS advises taxpayers to request their W-2, 1098, 1099 or 5498 from their employer or bank — or order a free wage and income transcript using the “Get Transcript Online” tool at IRS.gov.

You can find current and prior year tax forms and filing instructions at www.irs.gov/forms-instructions or by calling 1-800-829-3676.

Taxpayers typically have three years to file and claim tax refunds, otherwise the money becomes the property of the U.S. Treasury.

Generally the deadline to claim old refunds falls around the April 15 tax deadline, but this year the three-year window for 2020 unfiled returns was postponed to May 17, because of the COVID-19 pandemic. But if taxpayers haven’t filed a return for tax year 2021 and 2022, any 2020 refunds would be withheld until they file for those years as well to make sure they don’t owe.

“People faced extremely unusual situations during the pandemic, which may have led some people to forget about a potential refund on their 2020 tax returns,” Werfel said. “Some people may not realize they may be owed a refund. We encourage people to review their files and start gathering records now, so they don’t run the risk of missing the May deadline.”

Tax season officially began on January 29. According to the latest tax season statistics, more than 71.5 million individual tax filings have been submitted to the IRS this season.

Nexstar’s Ashleigh Jackson contributed to this report.