If you prepared the 2016 return in Online TurboTax and need the actual return, log in and go to the section "Your Tax Returns & Documents". Expand that and choose 2016. Do you find evidence of the return with a link to download/print the PDF? If not, we can tell you how to look for multiple accounts.
Or do you find the link to download/print the 2016 return, but access is locked and it asks you to pay? If so, we can tell you how to upgrade a 2018 return and pay for PLUS (19.99) to unlock all prior returns in that account.
tagteam also told how you can get a free 2016 tax return transcript from the IRS.
