I just went through the same thing. After about an hour in the same loop, I gave in and decided to start a new account, but...
1-First I google Turbotax
2-Clicked on first ad that says "TurboTax Official site"
3-Start to scroll down the page, and the "Start for Free" will appear in orange, top right, next to "Sign in"
Note: DO NOT go directly into that "sign in", link. It will send you on that loop all over again.
4- This takes you to the product page. Scroll down, select Deluxe (in my case). Start for Free!
5- Takes you to a page that asks about last years taxes. I selected "used TurboTax".
6-This takes you to log in screen. Log in with existing credentials. (trust me here)...
7- First screen that appears states your current product (Freedom), and asks if you want to upgrade.
8- Select yes. BAM! Turbotax Deluxe with all my current tax info!! Did not have to re-input a thing.
Enjoy!!
