No that is incorrect.

The first $39,375 is taxed at zero percent even if your total income is greater than $39,375.

I had a much greater than $39,375 capital gain and a much greater than $39,375 total income.
I am familiar with where the 15%, 20% and 28% threshold begin.

As I posted before do the
“Qualified Dividends and Capital Gains Worksheet” on page 33
by hand,
step by step.

If you are using a computer program, it might be double important for you to compare the by hand way.

TurboTax, for example has had to admit to making several mistakes over the years.

I paid my first taxes when the last no-nonsense President, Dwight Eisenhower, was in office.
I have seen many tax changes.