Hi -
Your AGI is your Adjusted Gross Income. This value from last year's filing is needed in order to electronically file your return as a way to validate your identity. Here is a helpful link that may give you more information about where you can find it: https://ttlc.intuit.com/questions/1900840-how-do-i-find-last-year-s-agi?jump_to=answer_3301618
