The bottom line is that some prior year amended returns can be efiled, and some can't.
There's really no rhyme or reason that we know of why this is so.
It could have something to do with timing (now is a bad time to try to Efile amended returns, since servers are so busy with current year), or it can possibly have something to do with items in the return, or it could possibly be random (who knows, it's the IRS).
The TurboTax FAQ about efiling prior year amended returns even says 'may be able to'.
Can I Efile My Amended Return?
@phraxos
**Say "Thanks" by clicking the thumb icon in a post
**Mark the post that answers your question by clicking on "Mark as Best Answer"
