Here are the steps you can use for 2021. I just assisted a customer with switching from freefile to Premier using these steps on 4/29/2021.
1. Go to https://turbotax.intuit.com/personal-taxes/compare/online/
2. Click "help me choose"
3. Select the options that apply to your situation
4. Click "start for free" of whatever product you want to use when it gives you the suggestions
After that, it asked how I did my taxes last year. Select Turbo Tax, then sign in. DO NOT CREATE A NEW ACCOUNT. Once signed in, click on Personal Info and it will ask if you're sure to want to change to a commercial product and not use the free file program. Select yes, click ok, and you'll be back into the normal system and out of the free file system.
