Query related to tax on pf withdrawal

Hi Sir,

I came to know that there is Tax imposed for premature PF Withdrawals (Before 5 Years). I have contributed to PF 4 Years and 9 Months (Sep 2009 to Jun 2014 through 3 different employers). If I withdraw the PF amount now, will it attract any Tax. If Yes, please help me understand it.

Thanks in advance.