Should i file Nil return?

param (Sub Broker) (46 Points)

14 September 2016  

i started my busines in 2012 and from Aug 2012 to april 2013 my businesa income was equal to zero and but after that from may 2013 to 2016 my income was good so my query is...should i file itr for aug 2012 to april 2013 ?? if yes then how bcuz incom is zero..only expense happen this period of time...plz help me respected members