Hey,
You cannot edit your VITEEE Application Form now because the deadline to edit the application form was February 28, 2018.

Procedure: In order to edit your VITEEE application form follow the following procedure:

1. Candidates must use the " Edit your application form, Edit Photo/Signature" option to edit the details or images.
2. They must submit the changes after they correct the mistakes.
3. The last date to correct or edit details in the VITEEE application form 2018 - February 28.

Source: https://www.getentrance.com/viteee-correction.html

You need to elaborate a little. At least, I need to know which entrance exam are you talking about.

Hello,
Kindly tell us about which engineering entrance exam you are asking as correction dates are already over for jee mains and wbjee.For other engineering entrance exams,to edit your application form you have to first login into your account and follow the mentioned guideline to edit your application form.
Good luck.