My income taxes paid does not equal the sum of all of the taxes shown on my W2. How can I confirm that all of the income taxes paid are accounted for?

only the amounts in box 2 of the w-2 counts as payments (unless you had more than one employer and went over the social security limit)  the amount would show up on line 17 of the 1040 

Thanks for the response on this. I have two W2s, one for me and one for my wife. The amount in "Income taxes paid" does not equal the sum of box 2 of the two W2s. It's pretty confusing because "Income taxes paid" is more than the sum of box 2 from both W2s, but less than the sum of Federal and State (boxes 2 and 17). One of us went over the Social Security limit, so could that explain the difference?

Other taxes could be any of the following:
Self-Employment tax
Unreported SS & Medicare tax
10% Early Distribution of Retirement plans penalty
Advance EIC from W-2
Household Employment tax
Etc.

You might be able to click on the amount and see.

If you are looking at a review or summary screen, those lump a lot of stuff together. So look at the actual 1040 return and actual schedules and make sure they are correct.