If the IRS continues to reject your tax return for the 2017 AGI, even though the AGI is correct, then try entering a 0 (zero) for the 2017 AGI. If the IRS still rejects the tax return for AGI, then you will have to print and mail your 2018 tax return.
See this TurboTax support FAQ for the procedure to print a tax return for mailing when using the online editions - https://ttlc.intuit.com/community/printing/help/how-do-i-print-and-mail-my-return-in-turbotax-online...
