Is it a specified trade or business? This explains it quite well:
https://www.bkd.com/sites/default/files/2018-08/Specified-Service-Trade-Business.pdf
Is this a qualified business?
Rental properties are typically treated as passive activities, which are excluded from the definition of a qualified trade or business. However, rentals that qualify as trades or businesses under IRC § 162 are not considered passive, and that means their income can qualify for the QBI deduction.
This article explains which rentals are and are not qualified businesses:
Is it a specified trade or business? This explains it quite well:
https://www.bkd.com/sites/default/files/2018-08/Specified-Service-Trade-Business.pdf
Is this a qualified business?
Rental properties are typically treated as passive activities, which are excluded from the definition of a qualified trade or business. However, rentals that qualify as trades or businesses under IRC § 162 are not considered passive, and that means their income can qualify for the QBI deduction.
This article explains which rentals are and are not qualified businesses: