If you'd like to change which NJ Transit Monthly pass you're enrolled to receive, you can do so directly in your Jawnt account by following the steps below.
In the "Enrolled Benefits" section of your Jawnt account, click Edit for the NJ Transit benefit.
On the next page, scroll down to Details and click on Monthly pass.
Select your new Origin and Destination and click Save.
You should now see your new Origin and Destination under the Details section.
Take note of the date that these changes will go into effect
Click Update enrollment on the bottom of the page.
This will bring you back to the My Benefits page, where you can see the status of your changes.