Turbotax asking for Schedule E Passive Operating Loss on rental property

We have a rental property and when running a final check on federal, Turbotax says: "Schedule E worksheet: Passive Operating Loss must be entered." And shows a blank box for me to enter a number. 

 

I have zero clue what to put here -- I'm assuming this is something that Turbotax should be carrying over? 

 

Saw a similar question and reply but still don't know what to put down based on last year's Schedule E.

 

Thanks.