Can i found out what my 2016 AGI amount is if i done them on turbo tax last year and don't remember my info to login back into last year's

You have to sign onto your TurboTax online account with the exact same userid and password you used to create the account.

If you may have forgotten some of your login information, see the following TurboTax support FAQ -https://ttlc.intuit.com/questions/1901535-forgot-your-turbotax-user-id-or-password

Or you may have multiple accounts, see this - https://ttlc.intuit.com/questions/1901486-problems-associated-with-multiple-turbotax-accounts

https://ttlc.intuit.com/questions/1900840-how-do-i-find-last-year-s-agi