Learning the system...

I’m a new user and have a couple questions to issues I am having. I purchased a Tascam US-1200 Audio Interface and it seems to be working properly. However, when I open Audacity and attempt to record, I do not get a signal.
I am using a Dell XPS-8900 system with Windows 10 operating system. I’ve made the US-1200 the default recording device, and in Audacity is set MME - ‘line in’ - Mono -
What am I missing?
Any help is appreciated.

Check in the Windows Sound Control Panel to ensure that you are getting a signal through to the computer (look in the “Recording” tab - you should see a green meter wiggling when there is an audio signal coming from the device). If that’s not working, you need to fix that before anything else.