Share market income treatment with salary income!

I am salaried person. My annual salary is 3.50 lacs. I have 80C & D deductions up to 50000. I am investing in share market. I am doing intraday transaction, also sometimes I am buying shares and sold it within 4-5 days, also I have sold some shares in this year which I bought in March 2020. So how can I calculate tax including my share income? How each type of transaction can impact my tax treatment? What should the best type of share trading to avoid tax liability? How can I calculate tax on share? Will tax on share will shown in speculative business income head?