25 February 2011
You must have deposited PF contribution in the PF combined challan.(in quadruplicate).
After the deposit, you have the triplicate & quadruplicate copy of challan.
You need to file a monthly PF return in form 12A. Alongwith this form you need to submit Triplicate copy of challan, Form 5 & 10 & also form 2 (if any addition of employee has taken place in that month).
You need to submit the monthly PF return by 25th of the next month.