@ Shishrr
This is a user community forum, but we can tell you what to do.
You didn't say what year return you are trying to acquire, but I'll assume you are asking about a prior-year return, since everyone still has free access to 2018 returns.
If you upgraded the 2018 return too far, it can only be cleared and started over if it has not been filed or paid for, or hasn't been already registered in Free Edition.
You didn't say if you have already filed your 2018 return or not. I suspect you must have already filed the 2018 return, if it won't let you use "clear and start over."
In any case, if it says that you cannot use "clear and start over", then you'll have to phone TurboTax Support tell them you upgraded too far accidentally, and ask them to unlock the prior returns. They may not even charge you.
Hours are 5AM-5PM Pacific (8AM-8PM Eastern) Monday-Friday.
FAQ: What is the TurboTax phone number?
https://ttlc.intuit.com/community/using-turbotax/help/what-is-the-turbotax-phone-number/00/25632
There's also a free option if a return transcript will suit your purpose. You may be able to immediately download one at the IRS website if you qualify to open an IRS account there. Otherwise, to order a transcript to come by postal mail takes 5-10 calendar days.
http://www.irs.gov/Individuals/Get-Transcript
