"
The "Tools->Attach" option is grayed out in the program."
For some reason, probably an oversight, the attachment functionality has been completely removed from TurboTax Business.
You most likely do have the 8453-PE form listed in Forms in My Return, but that is not the copy that gets transmitted with your Form 1065 and related forms/schedules; it is the signed, scanned, and uploaded file (which file includes the form) that is transmitted.
This issue has been reported, but may not get rectified until next week. You always have the option of filing by mail, of course, but I would suggest waiting for the fix (in the form of an product update).
