The most common cause of not getting a Qualified Business Income (QBI) deduction for an activity that had it in the past, is having a low net profit, or a loss.
There are many other limitations, including a high income phaseout, special rules for Specified Service businesses and limitations for entities.
For a self-employed taxpayer that files Schedule C, the amount that is considered Qualified Business income is your net self-employment income minus one half of your self-employment tax, the self-employed health insurance deduction and self-employed retirement deduction.
To check these figures on your return, start with line 31 of Schedule C. From that number subtract any entries on Schedule 1, lines 15, 16 and 17 that are associated with this business.
If your QBI is based on something else and you still have questions, please respond back with more details about your business type on which the QBI is based.
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