Your parent's insurance has no effect on the location of your AGI.
Where to find your 2016 AGIThe best place to get this number is from your originally-filed 2016 federal tax return.
Even if you amended it later, you must use the AGI from the 2016 return you originally filed, even if it's way off. Choose the 1040 variant you filed last year (below) to see which line shows your 2016 AGI.
Form 1040 – Line 37Form 1040A – Line 21Form 1040EZ – Line 4Form 1040NR – Line 36Form 1040X – Line 1, Column ADon't have a copy of last year's return? You can order a transcript from the IRS. Go to their Get Transcript site, choose Get Transcript Online, and follow the directions (if you don't already have an account, you'll need to set one up).
