I had invested 85,000Rs(2 seperate Certificate 40+45 thousand) in NSC in 2009(open in joined name 1st Name my Wife and Second Name Self) in 2010 i invested another 90,000Rs(2 seperate Certificate 45+45 thousand) in NSC(open in joined name 1st Name Myself and Second Name My wife Name) in 2011 i again invested 90,000Rs(2 seperate Certificate 45+45 thousand) in NSC(open in only in my Name) in 2012 i invested 80,000Rs(2 seperate Certificate 40+40 thousand) in NSC(open in joined name 1st Name my Wife and Second Name Self)

My Question is - my NSC opened in 2009 which is maturing this year 2012, will there be any tax deduction? and how much Tax will be deducted from it?