SEE-1 - Deductions and Credits - Section 3.2

Calculate the Qualified Business Income (QBI) deduction under Section 199A, including income thresholds, W-2 wage limitations, and specified service trade or business rules.

Calculate the Section 199A qualified business income (QBI) deduction, applying the W-2 wage and unadjusted basis limitation that phases in above the taxable income threshold. Recognise that owners of a specified service trade or business (SSTB) - such as law, health, or consulting - lose the deduction entirely once income exceeds the upper phase-out limit.

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