Maybe my experience will be of help to you. I supplied the usual data regarding my business (and other sources of income). Then Turbo Tax did the QBI deduction automatically. That was true for the 2 previous years, and it was true this year. I’ve already filed my taxes, and IRS sent my refund. Presumably that means i did nothing egregiously wrong!
So, my experience was consistent with what the expert said in response to your posting.
Best wishes.
