If you own a panel in the selected country, it will be listed in the Supply pane under Own panels. It is not automatically selected, to use it you have to manually select it.
For own panels you can see the feasibility available at that point in time and the Cost Per Interview (cost of the incentives + your company complete fee). To see the number of active panelists, see the Panel Info (hover over the panel's container and click "i" that appeared).
[Access Pro] target group containing only own panels will automatically be authorized, allowing you to immediately start inviting panelists into the project.