Service tax registration vs liability to pay service tsx

Hi all,

I have a query.. pls help.

We have registered with service tax department,  eventhough we don't provide services of value more than 10 lakhs.  ( one of our client forced us to take the registration ) .

Till now we don't have taxable services more than 10 Lacks and we don't expect more than 10 lakhs taxable services in future years too,  Is it necessary for as to collect and remit service tax to the department in subsequent years ?? Is the basic excemption of 10 lakh is available for the first year of registration only ??

If we cross 10 lack limit in an year, Is it compulsory for us to collect service tax for every bill raised in subsequent years ??