If you have not yet filed your tax return you can still go back and correct the address by following the steps below:
If you have already filed your tax return, you would not be able to correct the mailing address in TurboTax. You can try contacting the IRS at 800-829-1040 for assistance in updating the address to the IRS. In the meantime you can use the IRS change of address form to notify them of the change.
If you are receiving your tax refund by Direct Deposit there is no need to contact the IRS by phone you can just complete the Change of address form and this would not have any impact on your tax return.
If you are expecting a paper check in the mail, you should contact them right away.
Here are the instructions to change your address with the IRS IRS Form 8822 Address Change .
Also, don't forget to contact your state agency also. Here is an FAQ with instructions on contacting your State Department of Revenue.