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QBI Deduction
Also known as: Section 199A · Qualified Business Income Deduction
What it is
A deduction of up to 20% of qualified business income for pass-through business owners (sole props, LLCs, S-corps, partnerships).
What it really means
The single most valuable line on a small-business tax return most owners underuse. Phase-outs and specified service business rules make it dense — worth the CPA hour.