Delfina,
I see that you have a do-it-yourself rental posting. You can add the unit number to your posting by going to "My Postings" at the top of any RedWeek page, and selecting to view and then edit your posting. Under the tab for Unit Information, there is a field to add your unit number. Be sure to hit save prior to exiting.
If you need further assistance, please Contact Us.
Phyllis
RedWeek Support
RedWeek.com