You can't, we were told by Intuit.  That's the limitation with all of Intuit's professional tax products.  In order to e-file a 1040X, the original return must have been previously e-filed with the particular Intuit tax product you are using.  It is evidently not an IRS MeF limitation - I am aware of at least one other competitor's professional tax software that allows the e-filing of 1040X even when the original return was not e-filed with it.

@IntuitAustin @IntuitBettyJo  @IntuitBoris confirmed in the PTO FB group this is still a limitation in spite of the omission of the blurb (which is present in the FAQs for ProSeries) in the FAQs for Lacerte and PTO.  He said he would have the Contents Team update the FAQs but nothing has changed.  Could you please help follow up?  Thanks!

@IntuitAustin @IntuitBettyJo  @IntuitBoris

AND, while you are at it - could you please explain the "logic" behind this ????

And the reason the client doesn't want to file on paper, is .... ?

I think too many practitioners still think that e-filed amended returns are like e-filed original returns, they zip through the system unseen by human eyes.   Reality:  All you gain is a few days before the return is converted to something that an examiner can see on a screen.   

True... but I just hate dealing with paper anymore (from the chick that initially fought e-filing...😊 )

I efiled my first one in October. A refund was due. Despite IRS saying allow 12-16 weeks, the check arrived in 4 weeks. I was shocked. 

That would not happen with a paper 1040X, even in preCOVID times.

I paper-filed many 1040-X returns over the last decade.  Some took four weeks, and others took fourteen.  If they pass the initial classification, whether paper or e-file, the adjustment is made quickly to stop the running of interest.  

For clients overseas, it's much easier to e-file than to file on paper.