Dear All, If you have interstate sales then you should have a valid TIN no. even your sales are just Rs10/-. As per Sales Tax Dept. Rs.10lac* is free from any taxes if you sold with in your state. Also if you have TIN no. then you should charged full VAT amount as applicable. There is no need of any FORM against your sells as your buyer is not a reseller, he purchase item for its personal use.
I think this information works for you. Thanks
*You should confirm all above with your state sales tax office or from any good CA.