Income tax query

SUNIL (INDIVIDUAL) (84 Points)

28 January 2017  

Sir

I am an Ex-serviceman ( retired on completion of 15 Yrs in 1986). I have now received difference of pension arrears in the financial year 2016-17 on account of 

(a)Calculating the full service pension ( for 33yrs)

(b) One rank one pension

Are the above arrears Exempted or Taxable? If taxable can I spread this arrears to my previous years and file my revised IT return and if so for how many years I can revise it?

Please guide...

Thank you