How can I ask a user to update a form response she has already sent?

I want to send an editable link of the form a user sent me, so that she can make changes. Now two questions

1. I know we can insert edit link, in the autoresponder, but is there any other way to do it, because the user already sent the form, while this feature was not activated.

2. Is there a way user can make an account on the website, and whenever she logs in her form gets repopulated to the last saved version?

1. I know we can insert edit link, in the autoresponder, but is there any other way to do it, because the user already sent the form, while this feature was not activated.

Since you say that the submission is already received, you may get the submission ID from the submissions view and send the edit link to the user in the following format.

https://www.jotform.com/edit/{submission_id}

Please be noted that this submission edit link can be used anytime to make any modifications to teh submission.

2. Is there a way user can make an account on the website, and whenever she logs in her form gets repopulated to the last saved version?

It is possible to create store the form submission in a session using one of the fields on the form. However, it works with a new submission which is not submitted yet. Please refer to the guide below that can help you with this.

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

Hope this information helps! Let us know if you need any further assistance. We will be happy to assist.