To login to the TrueVoIP Management Portal, visit http://portal.truevoip.us.
You will need your username/email address, password, and account (company) name. If you don't have that information, try using the "Forgot Info?" link or open a support ticket with TrueVoIP.
Enter your username or email address, password, and account or company name and click "Sign in".
Once you've successfully signed in, see the article Enabling My Apps to start using the system.