if they only withheld based on the 20646.82 in wages you would owe then social security taxes (7327.90-1280.10) = 6047.80 and medicare taxes of (1713.78-299.38)=1414.40. by the way is the income tax withholding correct based on the $118k. if not you could end up owing penalties for late payment
discuss with your what options they'll give you.
