in addition to what the others have said if you're getting the $2186 from the change in the tracker in the top left that could also include penalty if you haven't entered everything, estimated taxes etc.
Just switch to Forms mode to see the 1040 details including any penalty and "Qual Div/Cap Gn" worksheet suggested above has the calcs for the actual tax you should see your long term cap gain getting the appropriate rate and other things driving up the total due.
