The way to unlock a 2017 Free Edition return is to start a 2018 return in Free Edition in the SAME account and upgrade it to PLUS and pay 19.99. However, you have an additional problem. You appear to be using "Live Basic", at least that is what is indicated next to your screen name above. That product is a lot more expensive. If I tell you how to pay for it like it is now, it will charge you 79.99 for a Federal return.
If you first downgrade to Free Edition, then upgrade to PLUS, it will only cost you 19.99. I will tell you how to do all that, and you can decide if that's what you want to do.
I'll assume you prefer to pay the 19.99 instead of 79.99. So if you don't intend to use TurboTax to prepare your 2018 return, here's how to downgrade from Live Basic to Free Edition by using "Clear and Start Over."
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Once you clear your 2018 return, when it starts over choose Free Edition as your product, then follow the steps I'll leave you in an answer below.
