Roth conversions are made in a particular year, not for a particular year. If a distribution from a traditional IRA in 2022 is converted to Roth, the conversion is includible on your 2022 tax return, not on your 2021 tax return.
With Forms 1099-R entered correctly, TurboTax will calculate the correct amount to be shown on Form 1040 line 4b. The Traditional IRA Distributions section of TurboTax's Form 1099-R Summary will show the calculation of the amount on line 4b. If you have made nondeductible traditional IRA contributions, examine the IRS Information Worksheet to see that your basis in these contributions is properly reflected in TurboTax and Form 8606 to see the calculation of taxable amounts of distributions.
Assuming that you have done no overrides, with $21,894 being shown on line 4b you must have entered Forms 1099-R totaling at least that amount.
