Did you use Online TurboTax, and are you asking how to get a copy of your originally-filed 2017 return before you started amending?
Online TurboTax does not keep 2 different copies of your 2017 return. If you amended it, then that is the only copy.
It's recommended to make a backup copy of the original return before amending. But if you did not do that, then unfortunately, the amended return is what is saved in your account.
You can get a free tax return transcript from the IRS. You
may be able to immediately download a 2017 return transcript at this
IRS website at the link below. If you don't qualify to open a free IRS
account there, you can order one to come by postal mail, which normally
takes 5-10 calendar days.
http://www.irs.gov/Individuals/Get-Transcript
A full copy of the actual return from the IRS costs $50 and takes several weeks.
