You can try using forget password using your mail and number

If they asking your application no. for reset your password than you can try to contact the officials by sending mail or contact by there phone number they will definitely help you in getting your application number.

ALL THE BEST

Anjali, please check the Inbox of the Registered email Id and Messages to check if you have stored any communication mail from KEA when you initially registered. If you do not find it there, please reach out to the helpdesk at: keauthority-ka@nic.in . You need to mail them from your registered email id. They usually take 24-48 hours to respond to any mails. So mail them right away. And once you get your User Id you can login and get your application number. For downloading the admit card, please visit the official page kea.kar.nic and click on UGCET 2020 admit card download. Alternatively, you can also use the link https://cetonline.karnataka.gov.in/ugcethallticket2020/frmAT.aspx to go directly to the page. Enter your Application Number and Date of Birth according to SSLC OR 10th marks list. Clicking on that will take you directly to access your Admit card. Check if all the details mentioned on the Admit card are correct. If yes, download and take atleast 2-3 print outs for future reference. If there are any discrepancies, please mail the helpdesk at: keauthority-ka@nic.in (mailto:keauthority-ka@nic.in) . You can download your admit card until July 28th.