Add new services in service tax

Dear All,

We have made service tax Registration to pay service tax on transporatation (GTA ) Servcie tax. Now we have to pay service tax on onther services (Vehicle Repair & Maint. Labour Charges) as per 1st July 2012 New Ammendment.

Please guide me, what procedure i have to follow, May i have to ammend in my regisration Service Tax?, and for further tax libility from 1st of july 2012 on word  how i can calculate taxes, is there any codes. any changes in codes ... please guide me