Which itr should be file?

Commission & Brokerage and Technical Services come under Profits or Gains from Business or profession - therefore You will have to use ITR 4 or 4S respectively depending on your turnover.

If your turnover from business activities is less than 60 lakhs you can opt for presumptive taxation and compute income @ 8% of turnover - In this case ITR 4S will suffice. Instead if you want to declare income less than 8% of the turnover then you will have to maintain proper accounts and get it audited in which case ITR 4 is required

You can download ITR from this link 

https://incometaxindiaefiling.gov.in/portal/individual_huf.do