Enter your credentials.
In the pane on the left-hand side, select the "Extension and Trunk" tab.
Select the "Extension" tab.
Click on the "+ Add" button.
Here, you will want to fill in all the correct information for your new extension.
Note: Anything with an asterisk (*) is important and has to be filled out before you can finish creating the new extension.
When creating the new extension, be sure to look carefully through all of the tabs at the top.
When you are ready to save the extension, go to the bottom of the page and click on the "Save" button.
Once you have hit "Save," you should see your new extension in your extension library.