Firstly answering to your confusion !! See JOSAA is the joint seat allocation for the prestigious institutions like NITu2019s,IITu2019s,IIITu2019s and GFTIu2019sPreviously Joint admission board (JAB) for IITs/ISM and central seat allocation board (CSAB) for NITs/IIITs/Other-GFTIs. But not now.And answering to your main question. Yes you donu2019t have to fill form for the the prestigious institutes which are mentioned above,you have to just open the Josaa 2022 website and fill up the choices and after the seat allotment they will inform you whether you got the seat in particular institution or not.And secondly there are so many colleges who give admission based on the jee mian score you have to search them through the internet and fill the form accordingly. Some of the institutions which give admission on the Jee main score up to my knowledge is.Sastra university.Some state colleges in Hyderabad like CBIT,Vasavi.Thapar university.psg college of technology,coimbatore.Jadvapur university,Kolkata.(Jadavpur University,Kolkata is an University under West Bengal Government and admissions are done exclusively on the basis of WBJEE Ranks.)Delhi Technological University,Delhi.Veer surender sai university,sambalpurSSN collge of Engineering ,KAlavakkamShiv Nadar university,dadriThese are some of the top private colleges which accept jee main score.There will be some thousands of those when you can search the internet.And remember each and every college has separate form to fill and apply.The below link may helpful Top Engineering Colleges in India accepting JEE Main score in 2016And thirdly you asked about Thapar university: See I have gone thorough the website of Thapar it clearly shows that they completed first round of counselling so there is no chance for you to participate in it.Anyway itu2019s better to contact them and the number is available in their website!!