I made a traditional IRA contribution for 2016, but didn't convert it until 2017. Do I need to do an 8606 form

[dmertz · Accepted solution]

You must enter your traditional IRA contribution into 2016 TurboTax.  Assuming that you did not do a recharacterization (which you did not do if you did a Roth conversion), be sure not to indicate that you switched or recharacterized your traditional IRA contribution.  The traditional IRA contribution will either appear as a deduction on Form 1040 line 32 or Form 1040A line 17, or will appear as a nondeductible contribution in Part I of Form 8606.

If you made no Roth conversion in 2016, you will not have any entries in Part II of Form 8606.  Your Roth conversion performed in 2017 will appear in Part II of your 2017 Form 8606 next year.