As you have income in the nature of commission , you need to pay service tax on ur service after claiming one time exemption of Rs 10,00,000..
Secondly, you need to pay income tax presuming you have ample profit..after claiming tds deducted by party
Thirdly you need to deduct tds and deposit the same timely and file the tds return too.
Fourthly. There many taxed related with payroll such as PF ,ESI and Welfare fund etc. U need to deduct and deposit the same.
Lastly.. If you are availing the services which are fall under the category of reverse charge mechanism, you need to pay service tax on the same..
Hope this will serve your purpose.
Let me know incase you need further assistance