If you want to figure out what is "happening" to your QBI deduction from Schedule C, you can look at certain forms and worksheets within TurboTax. This is easy to do in a Download/CD version of TurboTax, but requires that you "print or preview" a PDF with all the forms and worksheets if you are using TurboTax Online.
In Forms mode of your TurboTax Home and Business (icon at top right in blue bar), find your Schedule C in the left column and click on it. The Schedule C will open in the window. Scroll down past the Part V to find the Qualified Business Income Deduction Smart Worksheet. Check question A and make a note of which QBI Component form is linked to your Schedule C. Then, "follow" your numbers through questions E-K in that smart worksheet to figure out "what happened" in your QBI calculation.
Those "smart worksheet" calculations "flow" to the separate QBI Component form for that business, and then to the QBI Ded Summary form to make the final QBI deduction calculations that show up on Form 8995 or 8995-A.
If the forms do not seem to be working correctly, you can try to delete the forms related to that Schedule C business that do not seem to be calculating properly, and go back through the Schedule C QBI questions.
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