March 31, 2015. The U.S. Postal Service recommends that you file a change of address two weeks before your actual move date. You can submit your change of address up to three months in advance or wait until much later, but it can often take a week before any of your forwarded mail is delivered to your new address.How do you change your USPS address?
How to File a USPS Change of Address. You may file a change of address form either in person at the post office or quickly and easily online: Open a browser and navigate to https://moversguide.usps.com. This is the official online change of address form for the USPS.