I agree with you, it would be very convenient if there was a stamp duty calculator and a Demat charge calculator implemented on the current Zerodha Brokerage Calculator tool.
I had the same question
Y u all woreied on STT of state wise…concentrate on trades …u can earn much more. …
no don’t need to modify this type of simple problem is acceptable… only 3 rupees up and down hoga… no need to worry this