Which return itr4 or itr4s suitable?

ninadra (Others) (91 Points)

03 August 2014  
I do software and web development business on my own (freelancing). Which type of return will be suitable for me ITR4 or ITR4S. I tried to fill through ITR4S but it is not allowing to enter business income by showing error message 'presumptive business income is necessary for ITR4S' . What does it mean ? Any help will be appreciated. Thanking you