For a long form, can a user save it without submitting it and come back to it?

It is possible to save the form data by enabling the Auto-fill option in the form settings. Please note that the feature allows saving the form filled information in the browser storage. So, the data can be accessed only when the form is opened on the same computer and same browser. Also, if the browser storage/cache is cleared, the form data will be lost.

If you want to have the form data to be displayed on any PC/browser, you may consider using session parameter method. However, it is required to be a multi-page form. Please check the following guide that can help you with this.

https://www.jotform.com/help/97-How-to-Save-Forms-and-Continue-Later

Hope this information helps! Please give it a try and let us know if you need any further assistance. We will be happy to help.