I Can't find a path to purchase a doweled copy of Deluxe without getting routed to the "sign up for Advantage" screen. But I don't want to sign up for Advantage

You can purchase the TurboTax Deluxe CD/Download version on our website here: https://turbotax.intuit.com/personal-taxes/cd-download/.  

You can also purchase it through third parties such as Costco, Walmart, Amazon.com, etc.  

Lastly, you can talk to one of our service experts, you can start that process here: https://support.turbotax.intuit.com/contact/