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The total dividends listed on line 1a include both U.S government obligations and ordinary dividends, so wouldn't only the U.S. government obligations be taxable on my federal return?

 

For example, if total dividends are $10,000, and the U.S government obligation percentage is 59.87%, wouldn't only $5,987 be taxable at the federal level? Or is the entire amount $10,000 taxable on my federal return?