Where do I go to see the itemization that was used to input??

[infotax2017]

There is a line item - line 16 on my 1040 - that the IRS is questioning. When I look at my back up, I can't find a number that corresponds. Can you tell me if this figure is a calculation?

[SweetieJean]

If you had Additional Medicare Tax withheld, include the amount shown on Form 8959, line 24, in the total on line 16. Attach Form 8959.

Include on line 16 any federal income tax withheld that is shown on a Schedule K-1. 

Also include on line 16 any tax withheld that is shown on Form 1042-S, Form 8805, or Form 8288-A. You should attach the form to your return to claim a credit for the withholding.

[KrisD]

Line 16 reports the federal tax you had withheld on you income statements, such as your W-2 and 1099's.

I suggest you look at these forms and see if they add up to line 16. 

You can also go to "Your tax returns and documents" on the Home page and look at the W2 worksheets to see if you entered the W2 correctly.