How to let users continue using the form at a later time

Is there a way, where a customer login is linked with your form? As in,
every time a customer logs in, he/she can see his/her past entries and can
change it? Does your service has this kind of capability, or can you guide
me how one can go about doing this?

You can use the Autofill feature of the form for this functionality.

User guide: How-to-Enable-Auto-Fill-on-Forms

 

The autofill feature will allow the users to come back to the form and continue where they have left of.

Let us know if you need further assistance.