Hi,

Since you have not mentioned about any exam or any course, I don't know how much I will be able to help you but here's what the thing is:

There's an All India quota counselling & State Quota counselling, like in NEET. So, if you fill the All India quota counselling form, you will be able to sit for the counselling process of the entire country just with a single form. But if you want to sit for the 85% state quota counselling then you have to fill up the counselling form of the respective state you want to take admission in. For every state, there's different forms for state counselling. So, one application won't suffice.

Hope this helps.