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.
Unfortunately we do not have Square Payment integration.
I will raise your request to our developer, but we can not give you any time frame when and if this will be implemented.
All of our available payment integrations can be seen here: http://apps.jotform.com/category/payment_processing
We are happy to announce that Square integration is now available: https://www.jotform.com/blog/246-Create-JotForm-Payment-Forms-Using-Square