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.
On a Premium account, you can add up to 3 sub-account users, so if you need to add more, you would need to upgrade to the next plan:
Economy: Up to 10 sub-account users
Professional: Up to 100 sub-account users
You might want to check this guide: http://www.jotform.com/help/232-How-to-Share-Forms-with-a-Sub-Account-User
Let us know if you have more questions, we will be glad to assist you.