USCIS - Change of Address rule

USCIS regulations require aliens to notify the Attorney General in
writing of a change of address within 10 days of the change. USCIS has
confirmed that this requirement applies to all immigrants and
non-immigrants in the U.S. The AR-11 change of address form can be
completed online at the following link:
https://egov.uscis.gov/crisgwi/go?action=coa.

Please note, in addition to the online AR-11 form, you must also update
your address online for each pending application with USCIS.
Instructions can be found at the link above. You do not need to submit
address-changes for approved petitions.