Interesting. I'm still a few months away from filing (I've already done my estimate and filed the extension since I know of several K-1 that I won't be getting until early summer). I also saw the "You can e-file this return, however you must mail the appraisal with Form 8453 which can be found with your forms when you finish your return". I generated an all-forms-needed-for-filing pdf and I did not find a form 8453 for the fed (although there is a 8453-OL for state). Looks like I will not be e-filing this year (again) but just printing out the whole tax form and mailing it in.
