Many thanks to all the TurboTax Business users who with their detective work have figured out a work-around. I've detached the 8453-FE and reattached it and have been able to successfully e-File my 1041 and CA-541 returns. After a few minutes I got the email from Intuit that the returns have been accepted.
You'd think that the creators of the software could have figured this out and been able to tell their customers what to do, or better update the software so that it doesn't have this error.
