i have forgot my userid so please can you help me one of this issue

You haven't mentioned the details of which you have forgotten the User id. But we do understand that you belong to Karnataka. If this is regarding KCET, Please check the Inbox of the registered email and mobile number. Please check if you do have the KCET user id. If you do not have them there, please reach out to the helpdesk: keauthority-ka@nic.in . Please reach out to them at keauthority-ka@nic.in  from your Registered Email id and mention "Lost Credentials" in your subject. They usually take 24-72 hours for them to respond. They usually take 2-3 days to respond. But if this is not regarding KCET, please do let us know and we shall help you with relevant information.