Income tax return

Hello Please guide me for Income tax return filling

I have two query as below:

1) I am student.Earning rs 4000 per months from Goggle ad sense  of my website.besides this i have earn income as a Bank interest on my Fixed Deposits.However, my total income including Bank interest does not exist Rs. 60,000 per year.

Now, my problem is that i want to file a return but i am facing the following doubt

>> My income form goggle adsense will be under which heads.
>> Do i have to attached any evidence with my reutrn for my income.IF yes, then what can i show for evidence.....

SECOND QUERY

2) MY brother used to sell e digital embroidery files online.Even he want to file a return this time.Usually he earn 10000 PM by the way of selling digital embroidery files online.Now, do even he has to show any evidence while filing return, if yes then what?
Second, under which head this income from selling embroidery designs will fall.

Please note that in above both case selling designs is not our business,We are just a students and for the sake of pocket money we do working on website.Besides, being a computer engineer we have made the website itself.So no other chareges involved in it.

BY THE WAY WHICH FORM I HAVE TO FILL???