An average refund of $858 is waiting for more than 2,900 North Carolina taxpayers whose refund checks have been returned to the Internal Revenue Service as undeliverable.

The checks, worth more than $2.5 million, can be claimed as soon as their owners update their addresses with the IRS.

"Every year, many taxpayers miss their refunds because they move without notifying the IRS or Postal Service of a change of address," IRS Commissioner Mark W. Everson said. "For those missing their check, the IRS is making it easier than ever for taxpayers to update their information and claim their refunds."

Taxpayers can use the "Where's My Refund?" feature on the home page of the IRS.gov Web site to learn the status of their refunds. To use it, a taxpayer must enter a Social Security number, filing status (such as single or married filing jointly) and the refund amount shown on the taxpayer's 2005 tax return. When the information is submitted, "Where's My Refund?" will display the status of a refund and, in some cases, provide instructions on how to resolve potential account issues.

Taxpayers can access a telephone version of "Where's My Refund?" by calling toll-free (800) 829-1954.

"Where's My Refund?" now has an online mailing address update feature for taxpayers whose refund checks were returned to IRS. If an undeliverable check was originally issued within the past 12 months, the taxpayer will be prompted online to provide an updated mailing address.

A taxpayer can also ensure the IRS has his or her correct address by filing Form 8822, Change of Address. Download the form from IRS.gov or request it by calling 1-800-TAX-FORM (1-800-829-3676).

Those who do not have access to the Internet and think they may be missing a refund should first check their records or contact their tax preparer, then call the IRS toll-free assistance line at 1-800-829-1040 to update their address.

To put an end to undelivered refunds, taxpayers can take advantage of Direct Deposit. Taxpayers who choose this service receive their refunds directly into a personal checking or savings account. Direct Deposit, which also guards against theft or lost refund checks, is available for filers of both paper and electronic returns.