As xmasbaby0 suggested above, if you filed real late in the year such as November 2018 or later, then try an AGI of 0 (zero) since your AGI will not be in the IRS efile database.
Also, before giving up and printing and mailing, try an AGI of 0 anyway--sort of like a "Hail Mary" football pass. Occasionally it will work for some people, although I can't explain it. But it can't hurt to try.
I also see you are using "Live Basic", for which you are paying an extra fee, and with which you can have on-demand live help from a tax expert by phone. Did you take advantage of all the features with that product, including the CPA/EA review of your return, which they will sign?
FAQ: What is TurboTax Live?
https://ttlc.intuit.com/community/choosing-a-product/help/what-is-turbotax-live/01/27191
FAQ: How do I connect with a tax expert in TurboTax Live?
https://ttlc.intuit.com/community/expert-review/help/how-do-i-connect-with-a-tax-expert-in-turbotax-...
FAQ: How do I schedule my review using TurboTax Live?
https://ttlc.intuit.com/community/expert-review/help/how-do-i-schedule-my-review-using-turbotax-live...
