Hello Sonali,
You can correct the CUCET application form through the 'applicant's login window'.
Corrections will be started from third week of April 2020. You should make corrections within the stipulated time period. Exam authority will not provide any correction facility after the correction date.
Only if you have completely filled the application form and paid the application fee, you will be able to make corrections in the form.
Here is the procedure you can follow to make correction in the CUCET Application form -
1. Go to the official website of CUCET.
2. Go to the ‘Candidate’s Login’ section.
3. Enter application Id and date of birth.
4. Then, click on “Login” button.
Application form will be opened on your screen.
Make corrections in the fields you want and click on submit button. Save the changes and keep a printout of the modified application form till the exam date.

All the best! :)