I.m assuming that what is happening here is that the loss from the rental property is being added to (meaning reducing) the QBI income from the Schedule C businesses, resulting in a lower QBI deduction than you would get if this were excluded. To change this in TurboTax, there is a question at the end of the rental section in step-by-step that asks it if is QBI income. Just answer no.
N.B. I doubt that there is a single rental property in America with a loss that qualifies as QBI-eligible, but plenty with positive net income.
