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.
I checked your form and it appears you have already accomplished this. The next button does indeed only show if the "Confirm Stock Analysis file has been uploaded" box has been checked. You could even just set the upload field to be the field require to show the pagebreak:
Please let us know if you have any other questions and we will be happy to help.
Thank you for using Jotform!
Thanks for the tip on the file upload, this is what I wanted to do.
If you need any help feel free to contact us again. If you have a new question/concern you may create a new thread here http://www.jotform.com/contact.