IRS has a posting: Error in Tax Calculation in Schedule D Tax Worksheet (Form 1040), see it here https://www.irs.gov/forms-pubs/error-in-tax-calculation-in-schedule-d-tax-worksheet-form-1040
I'm having same issue for tax year 2019 and it's still a problem with Turbotax. I'm assuming that Turbotax followed the logic used in IRS worksheet and has yet to change the software code. I've already spent too much time with Turbotax personnel to get resolution.
