QBI - no explanation for change

[ET3605]

TT2019 seems to record all my Sch C income ($1790) as net QBI.  It has this amount listed in a box as such on page titled "Are any adjustments to QBI needed".  I am not aware of any adjustments.  Several pages later, TT says my net QBI is $1673.  There is no explanation for the change.  Any ideas?

[KarenM90]

Can you clarify where (which Forms, Schedules, Worksheets) you are seeing each of these numbers?  

I am including a TurboTax Help Topic regarding the QBI Deduction.  This Help Article also includes (at the bottom) an explanation with examples of the calculation which may help explain the difference you are seeing.  QBI Deduction/Calculation