Pf queries (urgent)

Dear Friends,

Request you to please answer my some of the queries mentioned below:-

- Can any body please share the procedure for filling monthly PF return online.

- While filling NIL return is it compulsory to pay 100 Rs. administrative challan (In A/C No.2- 75 Rs. and A/C No.22- 75) monthly even the employees not working in firm or a company?
- What are the situations in which we have to pay 500 Rs. and 100 Rs. challans.
- Instead of paying administrative challan (100/500 Rs.). Shall we pay the PF amount to any one employee? If yes then we don't need to pay any 500 Rs. and 100 Rs. challans.
- Is there any way to get rid from PF (I meant surrender or something). As my firm is not working in construction department anymore. Currently I'm maintaining a small trading fiirm. 

Your help in this matter will be heartily appreciated.

Hope this query will help others also.