Step 1: Go to the TMS URL: 

Step 2: Choose the correct account

Step 3: Click on the TMS User menu item.

Step 4: Click on the Extension sub-menu item.

Step 5: Click on, "Create Extension". 

Step 6: To create a new extension, choose a type from the drop-down.

Step 7: Give the new extension a name and a number. (We suggest that this should follow the last created extension.)

Step 8: Click on the "Add Extension" button, to save it.

Note: As this account is Prepaid, the item will not be activated until the pro-rata invoice is settled.