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.
You can setup a limit on your form through the number of submissions (registration is full) or through the date (registration ended). Please refer to this guide: How to Limit Submissions in a Form
Also, you can just disable the form if you want to close and then enable it back if you want it to re-open. Here's a guide: How to Enable Disable a Form
Let us know if you need any help. Thank you.