I should have been clear. Mine is strictly schedule C income from 1099NEC. I have no expenses against that income. I do, however, also have W-2 income from my regular job. I did not check anything in the area you are suggesting below. Using round numbers, my 1099NEC income is $1,500 but QBI is $2,800. And as I stated, my net income is $1,500 because I didn't have expenses against the income.
I don't understand how I can get $2,800 in QBI.
I also think TurboTax should show how the $2,800 is calculated so it is completely clear and can be corrected (or overridden if necessary.)
