The QBID is a new deduction (new law starting 1-1-2018) so it would not have been shown on your prior income tax returns. The QBI deduction is computed on the net income a business (including rentals) produces so it is after all rental deductions such as mortgage interest, property tax, repairs, depreciation, etc. If the rental properties reported on your Schedule E report a profit, then you will likely qualify for the QBID if your taxable income is less than $315,000. If taxable income is greater than $315,000, the deduction may be reduced. The computation is a bit complicated.
