• Delhi VAT deposit, return filing, rates and accounts

I have started an online garment store - wwwpiouspick.com. It is a Pvt. Ltd. Co. Woud like to know following:

1. I sell garments which are either manufactured in our facility or simply traded. These include Kurtas, Suits, Sarees and Lajengas. What rates are applicable to my products? Are the rates same for sales made to clients in Delhi and to customers outside. How should i calculate my VAT?
2. What is the applicability on dresses sold to overseas clients?
2. How do I deposit VAT? Which form should I use and where do I deposit it? Is CST different?
3. How and where do I file returns? Where do I find the return format. 
4. When I courier the dresses do I need to attach any document with the courier. 
5. What registers / accounts do i maintain as I have heard about VAT credit. 
6. Is there any online source to remain updated about the changes.

Regards