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 would like to have checkboxes on your form, which would in the same time help you with the limits on how many times each can be selected.
If that is correct, then I would suggest taking a look at the Gift Registry widget.
You can see here how to add it to your form: How to Add a Widget to your Form
If you happen to have any additional questions or issues, please do let us know and we would be happy to assist with the same.