You can still file a paper return from these years using TurboTax CD/Download for Windows or Mac.
https://ttlc.intuit.com/replies/3301607
I'm trying to start school and it's saying that I filed my taxes wrong there saying I should have filed head of household so I'm needing the information from 2016 taxes
https://ttlc.intuit.com/questions/3355524-when-does-access-to-my-prior-year-turbotax-online-returns-expire
https://ttlc.intuit.com/questions/3404575-how-do-i-access-my-prior-year-2017-return
You can get a free transcript from the IRS:
https://www.irs.gov/individuals/get-transcript
How do I get a copy of a return I filed using online TurboTax?
https://ttlc.intuit.com/questions/1900748
How do I get a copy of a return I prepared using desktop TurboTax?
https://ttlc.intuit.com/questions/1900639