did you enter total dividend income because that includes qualified dividends? Not sure what version you're using
is this what you used (p.s. this is for 2023 as are most tax calculators you'll find on the interent)
https://turbotax.intuit.com/tax-tools/calculators/taxcaster
you'll see boxes for total dividends that must include qualified dividends and then a box for the qualified dividend portion.
the simplest way to avoid underpayment of tax penalties for 2024 is to pay 100%, 25% per tax period, of your 2023 tax. that jumps to 110% (27.5% per period, if your adjusted gross income for 2023 is over $150,000
