This is just an amount found on your prior year tax return (Line 11 of your 2024 Form 1040, 1040-SR, or 1040-NR).
This number is NOT on your 2024 W-2. You'll need to get it from the 2024 1040 federal tax return you filed or by requesting a transcript.
The IRS asks for this amount so they can verify your identity when you e-file and keep your information safe.
How do I find last year's Adjusted Gross Income (AGI)?
Where do I enter my prior year adjusted gross income (AGI)?
How do I get my prior year AGI if I cannot locate my return from last year?
What if I amended last year?