Where to enter real estate property the business owns and occupies?

You would record the business property as an Asset in TurboTax Business. To do this, select the Deductions tab at the top of the screen and then find Depreciation of Assets.  Underneath this heading will be Assets.  Select to start that section to enter your real estate property in TurboTax.

How do I add a residential real estate property the business owns and managers?

It only gives me the option to add nonresidential real estate or improvement to a business in TurboTax Online.