The info on the W-2 is entered and displyed correctly. However, there is an $8,000 error in the final entry. How do I correct it?

On the online form the federal income tax withheld is correctly shown as 1,899.38. However in the wrap up it shows the tax withheld as over $8,000 and a projected refund of $6,661. This is obviously incorrect. How can I get it corrected?