You can amend your tax return to claim the QBI deduction for which you are eligible.
The "flow" of the QBI calculation depends on the source of the QBI (Schedule C, Schedule E rental, Schedule K-1, or Form 1099-DIV), but in general the flow is from the source to a QBI Component worksheet to the QBI Ded Summary to the Form 8995/8995-A. By looking at those forms, you can usually diagnose "what happened" in your QBI deduction calculation.
During the preparation of your amended return, provide the details about source and what you are "seeing" in those forms and the Community or TurboTax Customer Service will be able to diagnose your issue.
You do not pay again to re-submit a rejected e-file, nor to file an amended return.
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