I have filed original e filing return before due date.Now I realised short term capital loss has been understated due uavailability of report from broker.Amount is substantial and actual a included in long term cap loss.Now I want to revise that return.Can be treated as original if I do not send e filing acknowledement to Bangarole center? Is there is any issue or delay in refund in revise return as per 134(4),if any?