I have a four-plex that I live in and rent 3 units. Do I qualify for QBI deduction?

Most likely. See https://ttlc.intuit.com/community/tax-credits-deductions/discussion/qbi-safe-harbor-250-hours-of-real-estate-rental-services/00/2639609

Even though I live on the property? I wasn't sure if an owner occupied property with multiple unit would qualify.(thanks for responding!) 

You only occupy one unit so that should make a difference.

I'll page @Mike9241 for input.

Hi @Mike9241 can you please advise. thanks. 

If the property is located within the United States and you rent it out for the intention of making money,  then you qualify for QBI.

Yes I rent it out 3 units but I live in one. Does that make a difference?

You do not use QBI for rental income. That is schedule E supplemental income and you are not a real estate professional.