Are these stocks listed in India or US?
If in US and if you were holding it in last year then you had to file the return of income irrespective of your income below taxable limit.
Amount of tax and mode of tax saving on such income would depend on what type of income is included in this 8 lakh i.e. the proportion and in general you can save tax by investing in ELSS funds, LIC, PPF etc by investing upto 1.5 lakh.
Hope you find the information helpful if you do please rate it 5 and provide your valuable feedback for my improvement.
Thank you.