Where do I enter my Roth IRA contribution in TurboTax?

[MaryK4]

Look under Deductions & Credits.  

[DoninGA]

To enter, edit or delete an IRA contribution -

Click on Federal Taxes (Personal using Home and Business)
Click on Deductions and Credits
Click on I'll choose what I work on (if shown)
Scroll down to Retirement and Investments
On Traditional and Roth IRA Contributions, click the start or update button

Or enter ira contributions in the Search box located in the upper right of the program screen. Click on Jump to ira contributions