From Sign On San Diego.com:
If you don't have your economic-stimulus or federal tax-refund check yet, it may be because the IRS doesn't know where you are.
The Internal Revenue Service has more than 15,300 tax-refund checks or economic-stimulus checks belonging to Southern Californians that were never delivered because of incorrect addresses.
About 5,000 of those checks, worth $3.5 million, are owed to San Diego County residents. The average check is $684.
To receive the check, a taxpayer needs to update his or her address with the IRS.
Federal law requires that all stimulus checks be delivered by Dec. 31. Those who are owed a check must update their address by Nov. 28, an IRS spokesman said.
There are two ways to see if you are owed a check and, if necessary, to update your address. Those with Internet access can go to the IRS Web site at irs.gov and click on either “Where's My Refund?” or “Where's My Stimulus Payment?”
Those without Internet access can call (800) 829-1954 to check on the status of their refund check or (866) 234-2942 to check on their payment.