E-filling is mandatory for all income tax payer?

I am a simple Tax-payer. My Income Tax file also not goes under Compulsory Adudited file. My Chatered Account says that it is not mandatory for that person/firms to e-filling who are not lies under compulsory auditing system. But one of my brother who are also a senior accountant/cleark in a Big CA Firm, had said me from the financial year 2011-12 (Assessment Year 2012-13) e-filling is mandatory for all individual/firm. If I submit the return manually then, IT Department will again ask me to file the return electronically. It may not be digitally signed.

Now let me inform that who is correct? The return filling date are knocking at the door. Please help me.