Hello Sir,
In order to get a Tax Credit for the amount of VAT paid, it is necessary for you to be registered under the state VAT Laws, only after which you can claim a refund.
Trust this clarifies your query.
Feel free to call / get back in case of further clarifications.
Thanking You.
Regards,
Rohit R Sharma
BCOM, ACA, LLB-GEN, CERT. FAFP