How do I know which is my "Company Login ID" to be able to log in TTS Corporate?

The "Company Login ID" is part of the authentication credentials of company users.

To know which is your "Company Login ID", please contact an admin user of your company and he will be able to tell you the "Company Login ID".

If you are an admin user of your company and there is no other admin you can ask to, contact your travel agency and ask them which is your "Company Login ID".