TCR SMS

We don't use SMS for anything but texting our store managers if they are having an issue that requires them to call us back for support. We have never texted a customer, and have no mechanism to ever send SMS campaigns. Anything to do with marketing SMS/Email is 100% outsourced third-party for them to send and is managed on their own hosted systems. I'm struggling with understanding how I am supposed to fill out a form that is not applicable to our business and yet keep SMS to our internal employees.