Your AGI is the adjusted gross income from 2019. It is equal to the total income you report that's subject to income tax—such as earnings from your job, self-employment, dividends and interest from a bank account—minus specific deductions, or “adjustments” that you're eligible to take.
You will find your 2019 AGI on your 2019 Form 1040 on Line 8b. If you did not file taxes last year, you will chose that option when file your return and the AGI question will not be asked.
