Can I access their forms in progress at any time using your services?

and also can I access their forms in progress at any time using your services?

We only collect data from forms when the form is submitted.  It would not be possible to track forms in progress.

If you would like to allow for submitting partially complete forms, you can send an edit submission link along with the confirmation email:

https://www.jotform.com/help/40-How-to-Let-Users-Update-Their-Form-Submissions-at-a-Later-Date

The data submitted through the form would be available in your JotForm account:

https://www.jotform.com/help/269-How-to-view-Submissions

You can track their progress from there.