How can I pass the fields from the first form to the main form when utilizing the save and continue later option?

Requires 2 forms - understood.  However, what correlates the first to the second when you look at your submissions?  I'm guessing that I have to have the applicant put their name on the second form also.

If you will be looking at the submission data of the FIRST FORM, then all you would see are fields on that form (same goes for the MAIN FORM).

If you want to link/correlate the fields from the FIRST FORM to your MAIN FORM so you have the data consolidated, you can prepopulate your MAIN FORM using the fields from the FIRST FORM using URL parameters. This was covered at the latter part of the guide I'm linking below.

Complete guide: How-to-Save-Forms-and-Continue-Later

Here it is for your reference:

If you would like to pass the name and email field from the FIRST FORM to the MAIN FORM, that is easy as well. Follow the guide on Prepopulating Fields to your JotForm via URL Parameters to learn more on how to setup the URL parameters.

In our example, to pass the name and email we would add &name={name}&email={email} at the end of the URL:

https://www.jotform.com/XXXXXXXXXXXX?session={email}&name={name}&email={email}

As you can see, we still need to include the session parameter and only appended the name and email parameters.