Warning for Medicare Tax box-

Mag-Filer does a calculation to check this amount, but due to rounding differences with monthly withholdings. The calculation done against the total amount might be different by a couple of cents. This warning is only a suggestion for you to check and make sure you have entered the amount you actually withheld and did not just make a typo or import the wrong amount. If the amount in the box matches your accounting system you should not change it. This warning does not prevent you from 

E-filing and you should report the actual amount withheld.