The Internal Revenue Service is looking for taxpayers who are due to receive a combined $123.5 million from 107,831 refund checks that were returned to the IRS by the U.S. Postal Service due to mailing address errors.

Doug Shulman

“We are eager to get this money into the hands of taxpayers, so don’t delay if you think you are missing a refund,” said IRS Commissioner Doug Shulman in a statement. “The sooner you update your address information, the quicker you can get your refund.”

All a taxpayer has to do is update his or her address once. The IRS will then send out all checks due. Undeliverable refund checks average $1,148 this year, compared to $990 last year. Some taxpayers are due more than one check.

Average undeliverable refunds rose by 16 percent this year, which was in line with the 16 percent rise in average refunds for all tax returns in the latest filing season. Several changes in the tax laws likely played a role in boosting refunds, including the First-Time Homebuyer’s Credit and the Recovery Rebate Credit, among others.

If a refund check is returned to the IRS as undeliverable, taxpayers can generally update their addresses with the “Where’s My Refund?” tool on IRS.gov. A telephone version of “Where’s My Refund?” is available at (800) 829-1954.