Qualified dividends are taxed at the rate applicable for long term capital gains which is lower than the rate applicable for ordinary dividends.
For example, if you are in the 22% tax bracket, the rate for qualified dividends is 15%. If you amend your return, you'll save 7% on $78, which is $5.
This is a small amount which may not be worth the time and effort necessary to file an amended return.
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