I need my 2017 Adjusted Gross Income

[DoninGA]

For the 2017 AGI -

Form 1040 – Line 37

Form 1040A – Line 21

Form 1040EZ – Line 4

You can also get free transcripts of your federal return from the IRS - http://www.irs.gov/Individuals/Get-Transcript

[VolvoGirl]

Do you need it to efile 2018?  If you filed 2017 late in the year try using 0 for the AGI to efile.

How to find your AGI
https://ttlc.intuit.com/community/agi/help/how-do-i-find-last-year-s-agi/00/25947

[TwilightZone]

You will it on line 37 or 38 from form 1040 individual tax return.