Ref: HR 1 Tax Cuts and Jobs Act
Assumption: You receive income from your sole proprietorship, S corporation, LLC , partnership or other pass through entity. Also, that entity is NOT a service business. Example: Retail, manufacturing or leasing personal property.
Simple example: Net income from the business is $350,000 and the business paid total W2 wages of $100,000. Assuming no equipment placed in service in the year, the deduction would be the lesser of 20% of $350k ($70k) OR 50% of wages of $100k = $50k. The pass through deduction is $50k.
This deduction is taken on page 2 of the Form 1040 when determining taxable income. It is NOT taken into account in dertmining Adjusted Gross Income (AGI) on page 1 of the return.
This is a simple example. Your pass through deduction should be calculated specifically to your tax situation.