You are misinterpreting the result. Apparently your traditional IRA contribution is nondeductible and you also made a IRA distribution or Roth conversion in 2020. Generally, nondeductible contributions made for 2020 after December 31, 2020 are not treated as part of your basis in nondeductible traditional IRA contributions that reduce the taxable amount of your traditional IRA distribution or Roth conversion but simply increase your basis in nondeductible traditional IRA contributions that will apply to distributions or Roth conversions in 2021 and beyond.
