Nathan form Trulia here! Depending on how we receive the listing there are a couple of options for updating the contact information:
If the listing is coming through a feed source the contact can be updated through your feed provider.
If you are manually submitting the listing through your account page you can update your contact information via your profile:
To make changes to your email address, personal information, and more:
1. Log into your Trulia account with your primary email address and password.
2. Hover your mouse indicator over your name in the top right hand corner of the page and click on "Profile" from the drop down menu that appears.
3. Click on the big orange button on the left side of the page that says "Edit Profile".
4. Click on the title (Email Addresses and Facebook Connect, Change Password, Personal Information, etc) for each section you would like to update. (profile photo can be uploaded with the link under the photo)
5. Be sure to save your changes at the bottom of each section when your update is complete.
If you have additional questions, please visit our help center here: https://trulia.zendesk.com/hc/en-us.