When deduction under 80c cannot be claimed ?

No such sittuation, payments as per this section mad0e by you then you will get it as deduction upto 150000

Nevertheless NRI having LTCG only they can't claim 80 C deduction

if you cant get 80c if you have income from house property then where will you claim the principle repayment of housing loan and where will you claim life insurance premium paid .....the thing is you cannot claim , not only 80c but any deduction from chapter 6a if you did not file the income tax return within due date specified under section 139(1)

but as per the information i have recieved....dont take me wrong....if returns are not filed within the due date, the assessee wont be able to get any deduction under chapter 6a