Retirement tax questions

On your W-2 reduce the amount of Medicate taxes withheld by $0.01 cent and that should correct the error.  Medicare taxes are 1.45% of the amount in box 5.

For the Social Security taxes they cannot be more than 6.2% of the amount in box 3.  So reduce the amount in box 4 by 1 or 2 cents as necessary.