RSU W-2 disposition calculated by TT is different from the number listed on w-2 box 14

In one of the steps, I saw this - "Let's review your employee stock plan results" and "We've calculated your disposition amounts based on your employee stock sales" Make sure you check your W-2 to determine if your amounts were included in your box 1 wages", and then there is a Plan type - RSU and W-2 disposition $xxx.xx, and a check mark under "Reported on W-2". I found this disposition amount is quite different from the W-2 box 14 RSU amount. It's only a fraction of where box 14 listed. Does this TT calculated W-2 disposition amount mean how much I sold out of where box 14 RSU amount received? Thank you!