Query about belated filing

Ram (Broker) (28 Points)

08 June 2015  
I would like to know the IT department policy regarding belated filings.
 
Is it possible to manually file tax returns for FY2012-2013, FY 2011-2012 and FY2010-2011 now?
 
Is there any penalty for belated filing? Is it true that belated returns can be filed only until expiry of 2 years from end of FY?