I filed my taxes last year using turbo tax how can i get a hold of my tax returns? im filing and im at that part where they ask me for the2015 records on tax returns,agi

You can read below about where to find your AGI.
https://ttlc.intuit.com/replies/3301618
How to get a copy of your return if you did use TurboTax Online:
https://ttlc.intuit.com/replies/3301525
If you didn't use TurboTax Online to file last year (and/or you don't have a copy of your return) then you'll need to request transcripts from the IRS or file by mail:
https://ttlc.intuit.com/replies/3301999
https://ttlc.intuit.com/replies/4170366
If you did, but can't access your TurboTax Online account or your prior year data isn't showing up in your account, then read below:
https://ttlc.intuit.com/replies/5667209