Niki from Trulia here. If I understand correctly you wish to edit your rental listing.
You can edit your listing by logging in to Trulia, hover your mouse pointer over your name in the top right corner of the page. The site navigation menu will appear as a drop down menu, click on "my listings". Once in the listings page choose the "for rent" tab. Your property will appear with an "edit property" button.
I would suggest you contact Trulia customer support directly, I see that you have un-subscribed from Trulia email. You will not receive your lead notifications with the current settings. Please call 1-888-466-3501 or email to firstname.lastname@example.org.
Thank you for using Trulia for all of your real estate needs.