Log into your account online.
Go to the section "Your Tax Returns & Documents." click that line or on the word SHOW to expand that section.
Choose 2016.
Then look for a link "Download/print the PDF."
What happens when you click that link? Can you retrieve it, or does it ask you to pay?
There is also a link to "download the *.tax file". You can download the *.tax2016 data file so you can transfer it into your 2017 desktop software.
If it asks you to pay, we can tell you how to contact TurboTax Support since you already bought 2017 Home and Business Edition.
If you don't find evidence of a 2016 return at all in that account, we can tell you how to look for multiple accounts.
