If one of your W-2s indicates it is a "corrected" W-2, that is the one you want to enter. Instead of saying "corrected" it might say "W-2C". If one of them isn't corrected, could they each represent 1/2 of your income? If so, enter both. If they both are for your entire year's income and they were both reported to the IRS, you have a problem. You need to go back to your company's payroll department and find out exactly what the situation is.