Under the Personal Income tab, then under the "Business Items" section elect to start/update Rental Income & Expenses (SCH C).
Work it through without changing any selections presented, until you get to the "Rental & Royalty Summary" screen. On that screen you will see your rental property listed.
Elect to EDIT the rental property. Now you're on a screen titled "Review Your [propertyname] Rental Summary". You see Property Profile, Rental Income, Expenses, etc.
Scroll all the way to the bottom and click the "Done With Rental Property" button.
Work it through and about 2-3 screens you'll be presented with the QBI questions.