Hi Josna, 

   As you have finished your document verification, I am sure you have been provided with a security key. You will have to use the security key and input your preferences of colleges on the prescribed date. And once youre done with this, you will be allotted a college according to your rank and preference.

You can also go for the second round of allotment if you are not satisfied with the college you got the first time.

And once you have finalised the college, you will have to fullfil the procedures for it like paying of tuition fees, hostel fees,etc

Hope this helps you. All the best.