Your 2017 AGI is on your 2017 federal tax return.
To access your current or prior year online tax returns sign onto the TurboTax website with the userID you used to create the account - https://myturbotax.intuit.com/
Scroll down to the bottom of the screen and on the section Your tax returns & documents click on Show. Click on the Year and Click on View adjusted gross income (AGI)
You can also get free transcripts of your federal return from the IRS - http://www.irs.gov/Individuals/Get-Transcript
If you did not file a 2017 federal tax return then enter a 0 (zero) for the 2017 AGI
Please do not post your name and/or personal information here in the public user forum.
Where do I find my AGI?
Your 2017 tax return shows your 2017 Adjusted Gross Income (AGI) If you filed a joint return then the AGI is the same for each of you.
Form 1040EZ line 4
Form 1040A line 21
Form 1040 line 37
If you are using the same TT account that you used last year, you should also be able to find this number in your Tax Timeline for 2017
If entering the amount from your 2017 tax return does not work, then try entering “0” instead. If that does not work and you still cannot e-file, then print, sign, and mail your tax return.
You can get a free transcript of your past return from the IRS:
https://www.irs.gov/individuals/get-transcript
Note: If you filed late or amended your return, your correct 2017 AGI may not be in the system.
https://ttlc.intuit.com/questions/1944348-how-do-i-print-and-mail-my-return-in-turbotax-online
Note: If you mail your federal return, you will also need to mail your state return. You will not be able to e-file your state return.
https://ttlc.intuit.com/questions/1944348-how-do-i-print-and-mail-my-return-in-turbotax-online
it is a good idea to use a mailing service that will track it like UPS or certified mail. Then you will know the IRS received it.
https://ttlc.intuit.com/questions/2551840-where-do-i-correct-my-2017-agi-in-turbotax-online
See the FAQ at the following link for ways to get your 2017 AGI.