I was able to revise my submitted return to enter T3's autofill that was entered on my wife's return. It's a chore because you have to copy all the entries with multiple boxes and then transfer them. I had 7 separate entries from the same T3.
Like I said, I've got time and need of the refund, so I tried the revision and, thankfully, was successful.
Shame on you Intuit.
