No, 2019 amendments cannot be e-filed. TurboTax added that capability this year and only 2020 amendments can be e-filed. But you have 2 more years to do that, so get this 2020 tax return filed and then you can go back and amend 2019 later.
Do you have a reject code for the 2020 tax return that keeps getting rejected? You should use the AGI that was on your 2019 return when you filed it even if you are going to amend later.
How do I find last year's AGI? Use this article to find the 2019 AGI number you need to successfully e-file your 2020 return.
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