Hello, For most taxpayers, your Adjusted Gross Income (AGI) is an accumulation of several income items and adjustments and is not on your W2.
When you file your taxes, the IRS requires you to provide the previous year's AGI because the IRS compares that amount to your previous year's tax return in order to verify your identity. If the amount you report does not match what the IRS has on their records as your Adjusted Gross income from the previous year, they will rejected your tax return.
To find your AGI for this purpose, you need to get your tax return from the previous year, and on the Form 1040 you will find your AGI. Turbo Tax normally guides you to the right line depending on the document you are looking at.
Once more to emphasize, this is an IRS requirement when you file your own taxes - they use your previous year's AGI to confirm your identity.
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