Am i eligible for 80gg deduction ?

Thanks Poonam for your prompt response. So if I understand correctly income from job/profession/self employment is not a requirement to claim deduction under 80GG, Am I right ??

I have not claimed 80GG deductions for FY2014-15,FY2015-16,FY2016-17 which I had filed in the past. Can I claim the deduction now ??? Can I file a revised return and under which section ???

Thanks