How do I enter federal tax that was withheld on my traditional IRA?

On your form 1099-R, Federal tax withheld is reported in box 4 - Federal income tax withheld.

When you enter form 1099-R in TurboTax, TurboTax will transfer the tax withheld to line 25 b of form 1040.

In TurboTax Online, you can check that line 25 b of your form 1040 is correctly filled by previewing your form 1040.

To preview your form 1040:

1. Open your return
2. In the left-hand column, locate Tax Tools, click on the drop-down arrow then click on Tools
3. On the Tools Center page, click on View Tax Summary
4. In the left-hand column, click on Preview my 1040
5. Your form 1040 will display.
6. Scroll down to line 25 b and you should see the amount of tax withheld from form 1099-R.