Get leave encashment exemption while filling revised return

I am non Government employee.

In FY 2016-2017, I resign my first company and immediately joined the second company. In FORM 16 of my previous company, I haven’t get leave encasement exemption benefits under section 10(10AA).

I ask for the reason and in response company say “Since there is a lifetime cap on leave encasement exemption, company do not give the exemption for leave encasement”.

Is there any such restriction to get leave encasement exemption benefits under section 10(10AA)? Form 16 does not show any leave encasement exemption but can I claim it while filling revised return? And How to claim it?