I signed up for the wrong service. I wanted the Audit Defense service for $60, but I accidentally paid for Live Tax Advice. How do I get those switched?

Nothing account-specific can be handled in the user forum.  You'll need to speak to TurboTax Customer Support to see what can be worked out.

Here's how to speak to TurboTax Support.   If a voice robot asks for your issue to route your call, try saying "billing issue."

FAQ: What is the TurboTax phone number?
https://ttlc.intuit.com/community/using-turbotax/help/what-is-the-turbotax-phone-number/00/25632