what are the other taxes and charges besides brokerage on trades done on MCX.

I am in the process finalizing terms and conditions with my broker for doing trades in commodities on MCX besides brokerage + service tax on it, he has informed he has asked to charged Turnover Tax + Service Tax. My friends hve shown me there contracts notes, where nothing has been charged as 'Turnover Tax'
I will request the respectable members of the community to please apprise me about. The exact other charges which a broker is legally entitled to charged in addition to the brokerage. A reference of the website or other place from where i may read about the exact position may also be kindly mentioned.

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