Vat bill

if, you sell all over India, you cannot sell without VAT/CST number. In case of inter-state selling, CST is applicable. Though there is exemption in local sale(within your state), there is no exemption in CST, not even a single rupee.

You either sell tax-free items like books and unstitched fabric or get your TIN (VAT/CST no.) to avoid penalties by tax authorities.

And,It is your responsibility to fulfill your tax obligation

Sir,

I think it is not a taxation issue, it is matter of understanding between you and your customer, that on what condition you got P.O. i.e. purchase order from your customer.

IF there is pre-contion that you will furnish TAX INVOICE, againt the said transaction then your customer is willing to take advanage of Input Credit of VAT.

Now, as you are not a registered dealer whatever is the reason, your customer not be able to get credit of VAT, as you also paid VAT on purchase and add to your cost and charge from your customer and your customer suffer the loss and he can claim legaly the said loss from you.

IF there is no pre-condition then you can not be claimed by him.