Incorrect AG

[JulieS]

Yes, you can correct your prior year AGI in TurboTax before you file it, or to correct a rejection. Here's how to do it:

1. Sign in to your TurboTax account.
2. Select File, or if your return was rejected, select Fix my return, then select File.
3. On the Just one more step screen, select the Start to the right of Step 1.
4. Continue through the order screens until you get to the signature section. You can correct your AGI here.
5. Select Continue until you submit your tax return. 

If you need help finding your prior year AGI, follow this link for more. 

[VolvoGirl]

Try entering 0 for the AGI. The IRS might have processed your return later so the AGI didn't get entered in time.  Especially if you mailed it.  That works for most people. See,
https://ttlc.intuit.com/community/rejections/help/what-if-i-entered-the-correct-agi-and-i-m-still-ge...

How to correct the AGI in the Online version
https://ttlc.intuit.com/community/agi/help/where-do-i-correct-my-agi-in-turbotax-online/00/26311

If you can’t get it to efile you will have to print and mail it.
https://ttlc.intuit.com/community/printing/help/how-do-i-print-and-mail-my-return-in-turbotax-online...

Be sure to attach copies of your W2s and any 1099s that have withholding on them.  You have to mail federal and state in separate envelopes because they go to different places.  Get a tracking number from the post office when you mail them for proof of filing.