Deduction in respect of interest on house property

RVP27 (Student) (23 Points)

11 July 2016  
My uncle who is senior citizen while filing Income Tax Return for f.y.2014-15 showed deduction in respect of Interest On Housing Loan under section 80EE. However loan was taken many years before. Now, since he can't claim that deduction for f.y.2015-16 u/s 80EE wants to claim it u/s 24. Can he do so? What will be impact if he does so in respect of deduction claimed in f.y.2014-15 & f.y.2015-16?