Hi Mahal,

As far as the counselling guidelines are concerned, once registered and after payment the counselling type can not be changed.

If you wish to remove a counselling type then that can be done by use of a reset initialization option at registration page where any individual can reset the previous filled quota choice or counselling type and can fill the particular again and then proceed for registration.

Keep a note of this that this facility for individuals are provided only once. 

So, make sure you do not make the same mistake again.

I hope this information helps.

All the best!