how do i print a copy to review before I file?
The steps to take to print can be found here How do I print a copy of my TurboTax Online return before filing?
You will need to pay your TurboTax fees in order to print; or register the account if using the Free Edition version.
Needing to print my 2016 tax return,
This TurboTax article will tell you whether you have access to your 2016 tax return or not and if not, how to get access: https://ttlc.intuit.com/community/prior-year-return/help/when-does-access-to-my-prior-year-turbotax-online-returns-expire/00/26895