Per IRS Publication 535, Business Expenses, on page 5:
Deduction for qualified business income. For tax years beginning after 2017, you may been titled to take a deduction of up to 20% of your qualified business income from your qualified trade or business, plus 20% of the aggregate amount of qualified real estate investment trust(REIT), and qualified publicly traded partnership income. The deduction is subject to various limitations, such as limitations based on the type of your trade or business, your taxable income, the amount of W-2 wages paid with respect to the qualified trade or business, and the unadjusted basis of qualified property held by your trade or business. You will claim this deduction on Form 1040 or 1040-SR, not on Schedule C. Unlike other deductions, this deduction can be taken in addition to the standard or itemized deductions. For more information, see the Instructions for Forms 1040 and 1040-SR.
On page 3:
Deduction for qualified business income. For tax years beginning after 2017, you may be entitled to take a deduction of up to 20% of your qualified business income from your qualified trade or business, plus 20% of the aggregate amount of qualified real estate investment trust (REIT), and qualified publicly traded partnership income.
On page 5:
Deduction for qualified business income. For tax years beginning after 2017, you may be entitled to take a deduction of up to 20% of your qualified business income from your qualified trade or business, plus 20% of the aggregate amount of qualified real estate investment trust (REIT), and qualified publicly traded partnership income. The deduction is subject to various limitations, such as limitations based on the type of your trade or business, your taxable income, the amount of W-2 wages paid with respect to the qualified trade or business, and the unadjusted basis of qualified property held by your trade or business. You will claim this deduction on Form 1040 or 1040-SR, not on Schedule C. Unlike other deductions, this deduction can be taken in addition to the standard or itemized deductions. For more information, see the Instructions for Forms 1040 and 1040-SR.
On page 42:
Qualified business income deduction.For tax years beginning after 2017, individual taxpayers and some trusts and estates may be entitled to a deduction of up to 20% of their Qualified Business Income (QBI) from a trade or business, including income from a pass-through entity, but not from a C corporation, plus 20% of qualified real estate investment trust (REIT) dividends and qualified publicly traded partnership (PTP) income. The deduction is subject to multiple limitations, such as the type of trade or business, the taxpayer’s taxable income, the amount of W-2 wages paid in the trade or business, and the unadjusted basis immediately after acquisition (UBIA) of qualified property held by the trade or business. The deduction can be taken in addition to the standard or itemized deductions. See the Instructions for Form 8995 and the Instructions for Form 8995-A for more information.
For more information, see Publication 535.
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