There is no difference between sales tax and Vat. vat is a system where sales tax is levied on added value. Consttutionally, it is asales tax. Most of the states adapted the system of taxing the added value by each transaction ,after 1-4-05. which is called vat
CSt means CENTRAL SALES TAX levied on inter state sales.If it is against C form rate of tax, presently is 2 %. if it is without C form, it equal to local rate applicable in respective state.
For rates you can go to vat sites of respective state, go to SCHEDULE AND SEE THE RATES.It is difficult to tell you rates of all states india as they very from state to state
regards
DHARMNATH AVHAD