Works Contract

sir,

We have works contract (AMC) in Maharashtra as well as Karnataka. We have TIN No in maharashtra & Karnataka.Suppose, we have Work executed of Rs.50,00,000/- in Maharashtra & Rs. 50,00,000/- in Karnataka respectively during the period april'09 to Mar'10 then how to file VAT Return in Maharashtra & Karnataka respectively ? pls guide me as soon as possible ?????????????