Got the same receipt, and FP

I submitted my I-485 late September to TSC, and got the same receipt. I was going to call the number but somehow never did. Then yesterday I got in mail a FP notice (code 3) from USCIS, with an appointment scheduled for me already. I guess you can go ahead call the number and make an appointment. If you get a FP notice mail later, just call them again and ask them which appointment to go with.