There is no huge procedure for the choice filling and you simply have to select the collegesin which you want to get the admission and then you need to lock the choices and also the tabs for each and every operation is given in the website through which you are applying for the courses. So once again you go through the window and carefully read the instruction given in the window. And you can participate in the 3rd round without participating in the 2nd round.

Hi Varsha

To know wbout the steps process I would suggest you to go through the below provided article to know the complete procedure of NEET Counseling :

https://medicine.careers360.com/articles/neet-counselling

Yes you can participate in 3rd round for same you have to fill the registration form.For more details i would recommend you to visit our site :

https://medicine.careers360.com/articles/neet-counselling-faqs

Hope this helps you.

All the best.