Retirement tax questions

thank you for the quick response, however I just checked the percentages and they are correct, 

 

my W-2 

box 1 wage

box 2 10% of wage

box 14 

       tier 1    6.2%

       tier 1    1.4%

       tier 2     4.9%

 

however TurboTax continues tell me that they have overpaid by a couple thousand