Tax deduction under section 80TTB

While filing income tax return as senior citizen,  I am experiencing difficulty. 

Supposing my  income from interest on Bank Fixed Deposits is Rs 10 lakhs. 

In my tax return I  show this income under "Income from other sources"

Since I am eligible for claiming deduction of Rs 50,000 under section 80TTB, I wish to show this figure under the caption "Deductions".  On clicking the option "Section 80TTB" under 'Deductions' the website says "Fill the schedule for 80TTB".  But simultaneously the row gets dim and I see the caption "page is not responsive".  I am no able to reach any schedule to be filled in. 

I would feel grateful if someone pls help me as to how to fill up figure of Rs 50,000 under Deductions (Section 80TTB)

S S SANDHU