I've filed my I-485 under Employment Based category last week and for some emergency situation, I had to move out of state for couple of months from VA to IL. I will be receiving a receipt notice from USCIS anytime soon and wondering if I could change the address. I don't feel comfortable with my roommates where I will be receiving mails from USCIS and I wanted to know if I should open a P.O Box in VA . That way I can get all my mails from USCIS directly to my P.O Box ? Any words on this would be much appreciated.