Service Tax in Invoice


(Guest)

I have a small doubt.

I have recently set up a Service Firm, for which I registered Service Tax within one month of its startup. I did it for a purpose. Right now I have not crossed the limit to charge/collect Service Tax to my client

The doubt I have is with regards to Invoice: I want to issue an Invoice now. Should I need to mention my Service tax registration number on it? and also should there be a service tax column in the invoice (though it would be nil, I suppose) ?

Awaiting any advice. Thanx in advance.