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.
If I understood you correctly you want to disable your form at specific time, so that your users are unable to submit it.
Here are the steps how to set "Expiration date" on your form:
1. Open your form in form builder and click on "Setup & Embed"
2. Click on Preferences.
3. Select "Form Limits" tab.
4. Here you can change the "Expiration date" property of your from.
Inside of this guide you can also find how to limit submissions in a form:
Hope this will help. Let us know if you need further assistance.