https://turbotax.intuit.com/tax-tips/amend-return/amending-your-income-tax-return/L4B7pN42I
This article seems to say you can Efile 2019. Quote below. What am I missing?
Can I use tax preparation software to amend my return?
Yes. TurboTax walks you step-by-step through amending your federal income tax return.
Can I e-file a Form 1040X?
Yes, but only for tax years beginning with 2019. The IRS has set up a new system to handle amended returns going forward with 2019 but you still cannot e-file returns for years prior to 2019. You must print these earlier year amended returns out and send them in by mail.
