File 485 if current

Dear Sir 

I just changed employment last Oct and has old PD on Sep 15, 2015 (  also have approved EB2 and EB3 from old employer ) 

My current employer is on the way to file labor certificate for me now . If I got approved certificate and my old PD is current , can I include my son into part of my petition ? 

My son was born in 2000 and he is a full time student in Toronto University , he had H4 until last Sep when he started to study in Toronto