Crystal7 - It is all about the link that AAJF posted above. Did you read that? Intuit has an internal error that nobody there seems to be aware of or know how to sort out (in part because their support team is 100% unlinked from the people who actually fix things).
Until the Form 8453-S is flagged by an Intuit developer/manager in their database as "Supported", we will not be able to e-file. They are just being incredibly incompetent, proving that out-sourcing development and support leads to zero customer satisfaction.
PS. Uninstalling, or switching browsers (someone earlier talked about Chrome - which is irrelevant), will do nothing. The issue is in the Intuit Servers. I called support for the personal product and got a stupid reply to reinstall the software, so didn't even bother to contact support here knowing that they don't have a clue what they're doing when it comes to serious bugs or technical issues - only product usage issues.
Anyone else coming across this: do not uninstall, do not re-enter your taxes. We all just have to be patient for Intuit to find an adult to fix this.
