Value-added Tax (VAT) Registration, also erroneously known as TIN and CST Registration, is mandatory for any business entity engaged in the sale of goods in India and a turnover of over Rs. 5 lakh (although it may be higher in some states). It is a multi-stage state tax that accumulates at various stages of production and supply. At every stage, the purchaser pays the tax and is allowed to offset the same on subsequent sale. Consumers, therefore, ultimately bear this tax. VAT is collected by the state government and it is essential to know what the VAT rate is for the type of good or service you provide in each state you provide it in. Returns need to be filed on the 20th of each month (partnerships, LLPs and proprietorships can do so quarterly).