If the IRS is unable to deposit your funds into your bank account or you selected mailed check, the IRS will mail the check to the address on the return.
If the address on your return is incorrect, you will need to contact the IRS to have it updated. You can call the IRS directly using their toll-free number: 1-800-829-1040.
You may also use any of these methods to update your address on file:
Send a signed written statement with your:
Mail your signed statement to the address where you filed your last Federal tax return
The IRS can be notified by phone or in person. They'll need to verify your identity and address. Please have information they have on file for you, for example:
See also: How do I change my address with the IRS?