1) IF you entered only one W-2 in the tax program, edit it in the software to make sure you didn't mis-enter the $$ in box 3 or box 4 (don't use a comma for the decimal point).
2) If you are Married and entered a spouse's W-2 also, make sure you didn't tag her W-2 as yours (or the other way around)
3) If you entered two W-2 forms for yourself.....explain more. Are the Employer EINs the really same for both companies ? Was the same payroll agent used to issue the two W-2 forms such that both employer EIN's are the same?