Maybe this will help:
If I already paying taxes while trading so how can I pay again taxes ?
gst , stamp duty stt etc are indirect taxes
also have to calculate & pay income tax ( short term capital gains, income from business & other sources etc ) & get it audited if in loss etc ( if fall above 2.5 lakhs taxable limit ) .
go through zerodha varsity’s taxation module & watch youtube video on how to file ITR properly