Hi jazzie51,
In order to add your seller details profile to a listing you are creating, you just need to select that profile from the "Select Seller Details" pull-down menu on the Auctiva lister page. This menu is located directly to the right of the big blue "Select Template" button.
Any additional questions or concerns? Please file a support request using the appropriate link on our help page:
http://www.auctiva.com/free-auction-software-help/help.aspx-Mike