How to file income tax

i had a net profit of around 17 lakhs from fno in one year and i invested 5 lakhs of profit in powergrid and i dnt want to squareoff my position for this year .now how much tax i had to pay

You need to pay tax on Rs 17 Lac. Use the tax calculator on the Income tax website.

Check out detailed module on taxation while trading/investing on Zerodha varsity.