The qualified business income (QBI) deduction is not a business deduction; it does not appear on Schedule C or any other business tax return. Instead, it is a personal deduction on Form 1040 that is subtracted after reducing adjusted gross income by the standard deduction or itemized deductions.
Increase in value of property due to market conditions. When you sell appreciated property, you pay tax on the appreciation since the date of purchase. When you donate appreciated property held long term, you may generally deduct the appreciated value.