Equity trading and itr

Dear all, one of friend has salary income and Bank account savings interest and loss from day trading / equity investment from NSE. My query is as he has loss from equity trading where STT is already paid, this loss can be carried forwarded for 4 years max. as speculative loss and salary income can to used to file income tax return. Correct me if wrong. Please also advice me on which ITR form to be used. Thanks in advance.