How do I delete duplicate entry forms

How do I delete duplicate entry forms:

I am not sure if I have understood your question correctly. Do you mean to say that you want to delete duplicate submission which you have received in your form?

Unfortunately there is no way to automatically find duplicate submissions but you can select the desired submission from your form's submission page and delete it. You may like to take a look at the following guide which should help you:   https://www.jotform.com/help/377-How-to-Delete-Form-Submission-Data