If you manage domain names it will happen that your customer will want to transfer away. Preferably they don't, of course, but eventually you need to supply them with the authorization code.
In most cases the authorization code can be found in the domain details when at it via domain management.
If there is no code then this can mean one of two things;
This TLD does not use authorization codes. You can confirm this by checking our TLD documentation.
There is no code generated yet. Commonly because it is only valid for a short period of time, or because it is sent to the registry directly. In such cases, go to authorization code management to generate a new code!