TurboTax indicates 1040X can be efiled:
https://ttlc.intuit.com/community/amending/help/can-i-e-file-my-1040x-to-amend-my-return/00/26008
Post dated 10 February indicates efiling 1040X will be available soon.
As of 17 April, it is not available. On turbotax desktop, the only option to file 1040X is to print and mail.
Will this be resolved?
Have you updated your desktop software?
Yes. Fully updated. I even manually checked and see this:
Do you see option to efile the amendment on yours?