IF that doesn't clarify the situation, you should look at the Federal Tax Payments Worksheet for your 2018 taxes, to see what's on that to see if the $23,704 value can be explained from some extra entry somewhere/some other form. That worksheet breaks down all your (supposed) federal and state withholding entries by form type.
1) if you used the Online software for 2018, you log back into that same account and download a new PDF file of your 2018 tax return....the newly downloaded PDF file for 2018 will contain all the worksheets.
2) If you used the Desktop software for 2018, you would open that .tax2018 datafile again in the Desktop software, switch to Forms Mode, and look at the Tax Payments Worksheet directly.
____________*Answers are correct to the best of my knowledge when posted, but should not be considered to be legal or official tax advice.*
