Can a form be saved and then opened/edited next time?

If you're referring to the Form Builder, it has an auto-save feature. It means that every time you make changes to your form it will automatically save. You can also use our Revision History if you want to review and revert back the older version of the form. Here's a guide: https://www.jotform.com/help/294-How-to-View-Form-Revision-History

Hope that helps. Please contact us again if you have questions.