Most types of nontaxable income do not appear on your tax return. Why are you looking for nontaxable income?
What exactly do you mean by nontaxable income? A few types of income, such as the ones that VolvoGirl listed, can be partially taxable. For those, the tax return will show the full amount of income, and how much of it is taxable. Do you include the portion that's not taxable as nontaxable income?
