Quote Originally Posted by PaulO View Post
I had to double-check file permissions; I had a few files that belonged to root:root instead of the user that my web server runs as.
I also had to install the php-soap (for me it was something like yum install php53-soap when logged in as root) module and restart the web server; I did not need soap until I tried using TaxCloud
I meant to come back and post my resolution.

You are 100% correct with the soap extension.