If you filed 2017 late last year, or on paper...try a zero for AGI.IF that doesn't work you may have to switch to print and file-by-mail and take all your stuff to the Post Office to mail in.<a rel="nofollow" target="_blank" href="https://ttlc.intuit.com/questions/2562196-what-if-i-e-filed-before-april-15-but-my-return-got-rejected-after-the-deadline">https://ttlc.intuit.com/questions/2562196-what-if-i-e-filed-before-april-15-but-my-return-got-rejected-after-the-deadline</a>
Please see the TurboTax FAQ below for more information on your rejected AGI: https://ttlc.intuit.com/replies/5595742