Are you using the same TurboTax account last year as you're using this year? If you are, then you can obtain last year's AGI by doing the following:
- Expand 2016 Tax Year section.
- On the right under "Some things you can do" will be a link for getting the AGI for that year
If you are not seeing this, then you are most likely not using the same TT account as you were last year. You would simply need to log out and log in under the correct user id and password. If you need to do this and don't remember the old logon information, you can use the instructions below to recover it.
https://ttlc.intuit.com/replies/3302318
If you are still having trouble, you can click the following link and provide a brief description of your issue and you'll be directed to the appropriate phone support group.
https://support.turbotax.intuit.com/contact/