If you're using a TurboTax Online Live Assist & Review product, there are several ways to reach out for help:
You can contact a TurboTax Live expert by logging into your TurboTax account, then selecting Live Help You can request a review call within your return by going to the Review section in TurboTax
If you've purchased the Assist & Review service for your TurboTax CD/Download, you can access it by selecting the Expert Help icon, then select Book Appointment or Request a Callback.