Yes, you can get a Qualified Business Income (QBI) deduction even if you aren't self-employed. It is probably from some of your investment income.
In addition to business income, the following are eligible for the QBI deductions:
- Qualified REIT dividends from Form 1099-DIV box 5
- PTP income Schedule K-1 (1065)
- Commodities transactions or foreign currency gains or losses
- Certain dividends and payments in lieu of dividends
- Income, loss, or deductions from notional principal contracts
- Annuities, unless received in connection with the trade or business