When I efile it ask what my (AGI) gross income was for 2018 and if I filed taxes that year and I tried saying no and 0$ and it was rejected although I did file taxes last year for the first time and d

[CatinaT1]

The IRS uses your prior year AGI to combat fraud. 

You can find your 2018 Adjusted Gross Income (AGI) by:

• Looking at line 7 on page 2 of your 2018 Form 1040; or
• You can request a transcript of your 2018 tax return from the IRS to ensure you have the right number. You can request your transcript online at the following link: Get Transcript 

Check these items as well to ensure you have the correct number.  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 2018 AGI. (Don’t split the AGI amount or enter 0 for one of you).

Time-saving Tip: If what you entered is correct and you continue to get a reject, you won't be able to e-file. There's probably a data mismatch at the government, or some other situation beyond your control that prevents your return from being e-filed. In this case, your only option would be to print and mail in your return.

This article will give you instruction on how to print and mail your return.

[Stresstime9]

I went through this loop several times. Last year I had to complete a paper return, which takes over a year to be processed by the IRS. This year my 2021 return was accepted for e-file but my 2020 AGI was not accepted for ID because my 2020 return has not been processed, so I tried entering 0.00 for my 2020 AGI. Again it was rejected, then I went back to TurboTax hit the fixit button and this time it requested my wife's AGI.  Again I entered 0.00 and Voila! The IRS accepted. Suggest you do not include the $ sign with the AGI for ID just figures.