You can maintain multiple service tax units in the same company data.
To create a tax unit, enable the option in F11: Features > Statutory & Taxation for multiple tax units.
To create a tax unit
1. Go to Gateway of Tally > Accounting Info. > Statutory Info. > Tax Unit > Create.
2. Enter the tax unit Name.
3. Enter the Address.
4. Select the State from the List of States.
5. Enter the Pincode of the state selected.
6. Enter the Telephone number.
7. Enable Set/alter service tax details? to view the Service Tax Details screen.