Form 1099-DIV is entered underFederal TaxesWages & Incomechoose "I'll choose what I work on"scroll down to Dividends on 1099-DIV
If you mean dividends that should not have been treated as qualified due to holding periods or hedges:
If you imported, you can adjust the amounts in forms mode easiest or during interview.
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how/where do I enter qualified dividends