I saw this in the support section today
Can I e-file my federal Form 1040-X amended return?
SOLVED•by TurboTax•6456•Updated 2 weeks ago
Your 2022, 2021, or 2020 federal Form 1040-X amended return may be eligible for electronic filing if the original return was successfully e-filed using TurboTax.
Turbo Tax is saying I can - What is the process?
