CST Refund procedure

without revised invoice on @ 2% CST they issued you form C, great .............. revise your CST return for specific period, if the payment is made in cash, then you will get refund / adjustment after assessment only, if the amount is set off from vat , then you will have to revise vat return also, to rectify the CST transfer amount. you have time limit of 180 days from the date of sale, but do it before filing of june 11 return, otherwise you will have to revise the later on returns also.