Please review the following TurboTax FAQ on locating your
previous year's AGI:
https://ttlc.intuit.com/replies/3301618
To
confirm that you are using the AGI the IRS has on file, you can quickly
download a free IRS transcript of
your return from the IRS website which will include your accurate AGI. Select
the blue link above then 'Get transcript online'.
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.