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@mike9 wrote:

 because it adds all the income from all the activities. He will qualify if it is based on just the rental activity income

 

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That is what it is supposed to do.  The income limitation is based on the sum of ALL businesses.

As a side note, the last I checked the software did NOT add in (or subtract the loss) of a rental property because it assumes the rental does NOT rise to the level of a "Trade or Business",  If it does rise to the level of a "Trade or Business", you would need to manually change (override) the income limitation to factor in the rental.