Your Section 199A deduction becomes more complicated when you have

multiple in-favor trades or businesses,1 and

taxable income greater than $415,000 married, filing jointly, or $207,500, filing as single or head of household.

With multiple businesses and 1040 taxable income above the $415,000/$207,500 amounts, you likely need to consider aggregation, as we explain in How to Find Your Section 199A Deduction with Multiple Businesses.

Why? The business-by-business result can be dramatically different from the aggregate result, as you will see in this article.

Let’s examine an actual situation where the input of three businesses as one aggregated business produced a $94,131 Section 199A tax deduction, but the input as three individual businesses produced a 199A tax deduction of only $37,340. ... Log in to view full article.