That's only short term capital gains tax. Long term capital gains is taxed at a different rate than short term. I literally already mentioned that.
Edit: to be clear, Schedule D would include sales of assets that aren't required to be reported on 1040. https://www.irs.gov/instructions/i1040gi you can follow the instructions there and specifically where it tells you how to choose different tax rates than, you know, the income tax rate.