If you put the information into TurboTax in the Deduction and Credits section you need to remove the information.
The information for your contributions shows on your W-2 in Box 12. You do not need to put this information in any place else.
Your before tax contributions have already been deducted from your Gross Pay in Box 1 of your W-2 and your Roth contributions do not receive a deduction on your tax return.