Unable to Add Time Code RTC 3.0 M8 (Time Tracking)

Hi all,
we'd like to start exploring the Time Tracking feature.
Each time we try to add an entry there we get a No Time Code Present Message.
At this point, we think that we have to be able to add an element (Project code for instance) in the Financial Pane of the Planning Configuration data in the Process Configuration.
We also saw a timecode enumeration field in the Enumerations Pane.
Please tell us the formula add Time Codes and to enter time entries in the Time Tracking window.
Thanks in advance!
we'd like to start exploring the Time Tracking feature.
Each time we try to add an entry there we get a No Time Code Present Message.
At this point, we think that we have to be able to add an element (Project code for instance) in the Financial Pane of the Planning Configuration data in the Process Configuration.
We also saw a timecode enumeration field in the Enumerations Pane.
Please tell us the formula add Time Codes and to enter time entries in the Time Tracking window.
Thanks in advance!