Your Roll number is 10 digits. But for now the website isnt taking the last digit. This might be due to server issues. When you use either http://ntaresults.nic.in/NTARESULTS_CMS/public/home.aspx#   or http://ntaresults.nic.in/NEET19/Result/ResultNEET.htm for results you will be asked for your Roll  number, Date of Birth and Security Pin. Once you visit any of these pages you will see "View NEET Result 2020". Click on that and enter your login credentials. Your security pin is nothing other than the Alpha Numerical code that is mentioned just below "Enter Security Pin". Enter that. That is your Security pin. Your NEET 2020 score card will  be displayed. Download and take 3-4 copies of printout for future reference. And for a complete list of colleges that you may have a shot at, please use our College predictor: https://medicine.careers360.com/neet-college-predictor?icn=QnA&ici=qna_answer