Trouble reading channels with Focusrite

So yea, I’m having trouble figuring out how to get Audacity to recognize all the channels on a Focusrite Sacarlett 18i 20 interface. Right now, it’s only picking up the first two channels.
The mics to the interface work; and the interface to my PC work.
I’m hoping it’s a setting that I’m too big of an idiot to catch on too.

Any advice? Thanks.

iI’ve never tried it, but there is a WIKI page on [u]Multichannel Recording[/u].

You may need to step-up to a [u]DAW[/u].