To edit your listing:
Go to Listing on Dashare.com
Next to the listing you want to edit, click Preview
Click Back to Edit on the top right corner
Click Save & Exit after editing
There are a couple of other things to know about editing your listing:
Some of your editing options (for example: calendar, reservation settings, and pricing) won't appear until you've finished listing your space.
Edits only apply to bookings booked after you make the changes; they don't apply to upcoming reservations that were already accepted.