Is there a way for the participant to enter their info only once, and next time just sign in so they dont have to do the form all over again?

Hello, we run a non profit, and want to use Jotforms to RSVP and sign up to our events.

Is there a way for the participant to enter their info only once, and next time just sign in so they dont have to do the form all over again?

Unfortunately, we don't have the functionality to populate the fields from the previous data dynamically.

However, if you have already the data of the users in Excel or Sheet , you may use the Spreadsheet to form widget to populate the fields.

Guide:-How-to-Use-the-Spreadsheet-to-Form-Widget

Sample Form:https://form.jotform.com/81225198727968