Family Immigration Petitions

After I file a family based immigration petition, when my priority date has reached
will the INS contact me and if not then what is the next step that I will have to do?

My priority date was reached last month and I don't know if I have to wait for the INS to contact me or what else to do.

The INS will not contact you, it is up to you to act when your priority date approaches. Go the the INS website at www.ins.usdoj.gov it gives you all the info you need. It really is a great site with all the info you need about everything.