Punjab work contract in construction ?

Hi Friends,

I have this query, if anybody could answer this or direct me to the person to get support. I am new user and this is my first post :-)

I am an Electrical Engineer. Trying to learn accounts on my own for my own company.

If an Electrical Contractor company A (Registered in Punjab) has a WORK CONTRACT with Real Estate Developer B (also Registered in Punjab) for Electrification of Mall.

How will we calculate TAX liability on Company A  ?

Assuming following Numbers :

Tender Value (TV) = 1Cr

Supply of material in Tender = 70L

Installation of supplied material in tender = 30L

A is charging B no other tax, but Service Tax @ 4.12% on TV = 4.12L

Hence Total Amount (TA) payable to A by B = 1.0412 Cr

Now Company B is deducting :

(i) TDS @ 2% on TA = 208240/-

(ii) WCT @ 4% on TA = 416480/-

Hence Net paid amount to A = 97.87280 L

Now how will we calculate net Tax Liability (VAT and Service Tax) on company A ?

I am hoping for reply or some / any lead .

Thanks friends for your assistance :-)

Ganesh Kocher

Delhi