If your GarageBand file is set to "Podcast", there +IS NO+ radio button to turn off compression. I wanted an AIFF file because I was creating a new Outro for my Podcasts. So if I just change the file to a "Song" file, it will provide the ability to export to AIFF. Podcast will not.
Thanks for everyone's help. Knowing it was there somewhere helped me to continue searching for the answer.