• First go to their official website https://eamcet.tsche.ac.in/TSEAMCET/EAMCET_Homepage.aspx
• Fill the area with the appropriate details mention in the site
• If by chance you have lost your registration number then you must check out your registered e-mail as they send you a copy of your application information there.
• If you find it still confusing i suggest you to call to there helpline they will surely help you out with this situation
• Or send them Email Tseamcethelpdesk2019@gmail.com (mailto:Tseamcethelpdesk2019@gmail.com) .

hope that the answer is helpful to you.