The federal taxes withheld on the Form 1099-R as shown in box 4 of the form are entered by the TurboTax program on your federal tax return Form 1040 Line 25b. Assuming you entered the form 1099-R in the correct section of the program, Retirement Plans and Social Security and NOT in the W-2 section.
You can check to see if the amount is on your tax return by clicking on Tax Tools on the left side of the screen. Then click on Tools. Click on View Tax Summary. Then click on Preview my 1040.