CMAT

Source: The FAQ section of the CMAT official website.
If I have made any mistake (s) while registering for CMAT 2018, can I make changes later to rectify? You may select existing user login on CMAT website to make changes to your personal details, such as address, educational information or exam city preferences. For security reasons, editing of candidates full name, date of birth, email id, mobile no, state and country will not be allowed. However, if you have genuinely made a mistake in entering your Date of Birth, State, etc., you will have to show evidence of the correct data at the time of examination/interview/admission else your candidature will be nullified.
Note: The ability to edit application profile will be available only until you have not submitted the application form. Once you have submitted and made the exam fee payment, you will not be allowed to make any more changes. You may only view and print thereafter. If you have made a mistake in filling out details for those fields which will affect selection process such as the percentage of marks, category, gender, work experience, etc., then you are advised to re-register with a new email ID. Your CMAT 2018 application will be considered for the latest registration and Admit Card issued for the same.
Note: You will not receive a refund or admit card for your earlier registration. Failure to re-register in such circumstances may lead to nullification of your candidature.