Ordinary dividends are taxed at the ordinary income tax rates while qualified dividends are taxed at the lower capital gain rates. In any case, qualified dividends are always taxed at a lower rate than non-qualified dividends.
You cam amend your tax return to lower your tax liability and obtain a refund.
Please read this document for more information:
https://www.fool.com/knowledge-center/qualified-dividends-vs-ordinary-dividends.aspx
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