Service tax percentage

Hi Everyone

I was doing a job till a month ago.

Recently I have provided some research service to a management consulting firm. I haven't estalished the business legally nor I am planning to do so in the near future. They will be writing the cheque on my name.

Do I have to charge the service in the invoice? If yes, how much is the percentage? Assuming that my I want to recieve Rs. 100 as the net amount, which all components should I include in the invoice. Will the client deduct any TDS while writing the cheque?

Fee: Rs. 100

Service Tax: ??

Any Other Component: ??

TDS: ??

Net Amount Received (Target Rs. 100):??

Thanks

Vikas