If you filed a joint return, and are still residing with your spouse, both you and your spouse should sign the form or statement.
If you filed a joint return and you now have separate addresses, each of you should notify us of your new, separate address.
Authorized representatives filing a form or written statement to change an address for a taxpayer must attach a copy of their power of attorney or Form 2848, Power of Attorney and Declaration of Representative. Unauthorized third parties can't change a taxpayer's address.
Changes of address through the U.S. Postal Service (USPS) may update your address of record on file with us based on what they retain in their National Change of Address (NCOA) database. However, even when you notify the USPS, not all post offices forward government checks, so you should still notify us.
For changes of address relating to an employment tax return, we issue confirmation notices (Notices 148A and 148B) for the change to both the new and former address.