sir I have forgot my user ID and password of cet application form how do I get it back
You haven't mentioned which State Application login credentials did you forget. Every State has its own CET and so you need to mail them at their respective helpdesk. For example, if it is regarding KCET, if you have already checked your Inbox and text messages, then you have to mail the helpdesk at their email id: keauthority-ka@nic.in (mailto:keauthority-ka@nic.in) . But if you are not from Karnataka, then the procedure remains the same but the mail id changes.