What is JotForm?
JotForm is a free online form builder which helps you create online forms without writing a single line of code. No sign-up required.
At JotForm, we want to make sure that you’re getting the online form builder help that you need. Our friendly customer support team is available 24/7.
We believe that if one user has a question, there could be more users who may have the same question. This is why many of our support forum threads are public and available to be searched and viewed. If you’d like help immediately, feel free to search for a similar question, or submit your question or concern.
I am not quite sure if we mean the same thing, but if we do - yes. You can check and uncheck the checkbox any number of times if you so wish.
One click will check it and another click on the same (checked) box will uncheck it for you.
You can see a quick check box demo in the following screen capture: