Most government exam bodies do not offer an application withdrawal option once the form is submitted.
If you do not want to continue, you can simply not appear for the exam — there is no penalty for absence.
Some bodies, like UPSC, have allowed withdrawal of application within a short window in certain years.
If you applied by mistake or with wrong details, check whether a correction window is open.
Contact the exam helpdesk through the official email or phone number for guidance.
Never submit a second form to replace the first one unless the notification allows it.