it is more than likely from a 1099-DIV. A REIT qualifies for a QBI deduction.

You helped explain where the item is coming from (the REIT deduction is probably from a 1099-Div.). Thanks! However, we still don't understand why receiving a 1099-DIV can allow us to take a business deduction, since we don't own a business?

You don't have to "own" a business to claim the Qualified Business Income deduction; you just have to have qualified business income.

!099-DIV income from an REIT is "qualified business income" for purposes of the QBI deduction. The QBI deduction is not a business deduction, it is a business income deduction.