Income from other sourses

I have received 20000 rs as income tax refund from previous Fy. I have also received 600 rs as interest on refund. So the total value received is 20600 (itr4)

I am filing this years return in itr 4

My query is  

In the section of. Income from other sourses. It iswritten that 'income from incometax refund'. So should i put 600 rs as amount as that is the interest or the entire amount of 20600??

When i checked last year itr 4 form it was clearly written  ' interest on income tax refund'. In the  category of 'income from other sources'

So i need some clarification  please help

Regards

Dilip