JotForm is a free online form builder which helps you create online forms without writing a single line of code. No sign-up required.
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.
The sub-user is a JotForm account which has been granted with permission to edit a form created and hosted in another JotForm account.
If you haven't registered a free account yet, I would recommend you to do it at www.jotform.com, and if later you need to share your form or forms to another account ( so this user can view form's submission, or maybe edit the form, depending on the permissions you grant), please check this guide: https://www.jotform.com/help/232-How-to-Share-Forms-with-a-Sub-Account-User
Let us know if you have more questions, and if you need anything else, please open a new thread, we will be glad to assist you.