MVAT for delivery in India but foreign Invoicing

The sales tax depends upon the movement of goods. If it from your company located in India to other place in India then Sales tax will be applicable at the rate depending upon the nature of transaction (local/ interstate and the goods in question). But if you are making high seas sale transaction that is selling it before the goods entered into the customs water then the transaction will not be taxable.

So plan accordingly and follow procedures to respective transactions.