How do I change my address while I am waiting for my receipt number? NEW
The two easiest ways to notify USCIS that you have changed your address are to use the Change of Address Online web page or to call our National Customer Service Center (1-800-375-5283). For the Change of Address Online web page, you will need to know your receipt number. If you paid your application fee by check, your receipt number will usually be printed on the back of the check when it is cashed by USCIS.