Itr form filling

I have an income from a company as Technical services.  I give bill every month @ 25K and they deduct 1% TDS and credit Rs. 24,750/- to my bank.  There is no other income other than this.

I also do share trading.  I have LTCG, STCG and Intra day.  I am having loss of LTCG and STCG and have 6K gain in Intra day

I have LIC policy for 80C

Please inform me which form to use and how to fill my income.  Should I use ITR3, if so how to fill up.  Also do I need to maintain any book,  There is no expense.  Only travelling expense to this company.