As per my understanding, you are a carriage contractor with a company and have not paid Service Tax for the past period. Now the company with which you have a contract wants you to charge the amount by way of a Bill alongwith Service Tax. Since, you have not charged and paid Service Tax from last two years you want to know what is the minimum penalty for the past two years if you start paying Service Tax now.
In this case, Service Tax can be deposited alongwith interest for th past period by calculating the cum-tax value menthod. With respect to penalty for the past period, specific period is to be mentioned so as to see the relevant provisions of penalty existing during such period.
Raksh*t Verma
08800615751