There are a few possible reasons why you’re getting an e-file reject.

If you:

• Filed late last year after mid-November or your return was processed after that time—try entering 0.
• Amended your return last year—make sure you’re using the AGI from your original return, not the amended one. (If you only have a 1040X form, it’s on line 1, column A).
• Rounded your AGI to the nearest dollar—be sure to round up when it’s 50 cents or more and down when it’s 49 cents or less.
• Filed with your spouse last year—you and your spouse have the same 2019 AGI. (Don’t split the AGI amount or enter 0 for one of you).

If you’re still having trouble, we suggest that you check with the IRS to make sure that the copy of your return is the same as what they have in their records. To do this, you can order a tax return transcript. 

If you’ve tried everything and nothing works, you can still file a paper return by printing out copies of your federal and state returns and mailing them. We’ll include File by Mail Instructions on where to send your returns and what forms, if any, you need to include.

you are no help at  all / I don't know how you are still in business

If you plan to e-file your tax return, you may need to first find the amount of AGI from last year's return in order for the IRS to verify your identity. You can find your AGI on the form you used to file your last year's return.

If you did not use TurboTax to file 2019 tax return you have to retrieve a copy of that return to find the Adjusted Gross Income (AGI).  Or if you did not file last year then check that box.

If you filed and IRS adjusted your return your 2019 AGI may be different than the copy you have.  You can request a transcript from the IRS of the 2019 return to retrieve the AGI

There are several ways to find your prior-year AGI:

Preferred Method

You should always retain a copy of your tax return.  

• On your 2019 tax return, your AGI is on line 8b of the Form 1040.
• If you used a paid preparer last year, you might obtain a copy of last year’s tax return from that preparer.
• If you are using the same tax preparation software that you used last year, that software will likely have your prior-year tax return for you to access.
• If you’re not using the same tax preparation software as last year, you may be able to access your prior-year software and view an electronic copy of your prior-year return.
• If you are a first-time filer over the age of 16 enter zero as your AGI.

Use this link for more information:  Request AGI from IRS