@dmch1
No, I did not find a way to e-file an amended return. The TurboTax agent I spoke to, including granting screen access to look at the problem, told me it usually isn't possible with the desktop version as there are "limitations" and I should file the amended return by paper. That feels like a hassle since the federal + state amended returns amount to 100 pages of paper.
If you should happen to find a resolution, please let me know. Good luck!
