Is there a way in TurboTax to see how Form 8606 (for nondeductible IRA contributions and Roth conversions) prior to finishing our federal tax submission?

You would need to pay the TurboTax account fees before you would be able to view/print your complete tax return to include all forms and schedules.

To pay the TurboTax online account fees by credit card, without completing the 2019 return at this time, click on Tax Tools on the left side of the online program screen. Then click on Print Center. Then click on Print, save or preview this year's return. On the next page, to pay by credit card, click Pay Now. The next screen will show a review of your Fees, click on Continue. Complete the next screen to pay by credit card and click Continue.