I received a K-1 from my LLC that shows a loss for rental property. I entered the data and marked that I spent over 750 hours doing realty. But, nothing came off. Why?

First, keep in mind that to get tax back you must have extra paid in, so you may need to review your form 1040 and check out if the loss is flowing to your form 1040, but your refund didn't increase for other reasons in the personal tax calculation. 

Aspects to consider for qualifying, include; first if you meet both criteria and second the amount of time you spent working on the property determines limitations. The software will ask if you materially participated in managing the rental, which you must have to qualify. Also, passive activity loss and the at-risk rules can apply too. Learn more here: https://www.irs.gov/instructions/i1065sk1/ch01.html

To qualify as a real estate professional; you'll need to check off both options:

1. I spend more than 750 hours a year actively involved in real estate, AND
2. I spent more than 50% of my work-related time involved in real estate. 

If you select both of these options, the next screen explains that the amount you can deduct can be limited based on your level of involvement with each property. 

To preview your form 1040 and check amounts flowing on line 17, follow below steps: https://ttlc.intuit.com/replies/3302322