The best way to be sure you are using the same AGI as the IRS has on file is to quickly download a free IRS transcript of
your return which will include your accurate AGI. On your transcript, look for ADJUSTED GROSS INCOME (you may need to look on page 2). This is the number in the IRS database; make sure the AGI you enter matches this number exactly. (If you're unable to order an IRS transcript, try entering 0 as your AGI, assuming you haven't already gone that route.)
Failing that, you can opt to file a paper return.
See this FAQ for instructions to correct the AGI and re-submit once you have the AGI from your transcript: https://ttlc.intuit.com/replies/6079524