Make sure you are entering the exact same information you used when you registered for the CTET exam. This includes your name (including middle name, if applicable), father's name, mother's name, and date of birth.

Sometimes, technical glitches can occur with a specific browser. Try accessing the "Forgot Application Number" option on a different browser and see if it retrieves your information.

The Central Board of Secondary Education (CBSE) conducts CTET. They have a helpline for exam-related queries. You can call them on 011-22509455 or 011-22509456 and explain your situation. They might be able to help you retrieve your application number.

If you are still unable to retrieve your application number after trying these steps, contacting the CTET helpline is your best course of action. They can guide you on the next steps and potentially help you access your admit card.

https://competition.careers360.com/articles/ctet-exam-day-guidelines

I hope it helps!