I sent a letter to my local tax office, I considered this was wiser than calling in, considering the limited hours they are open to the public, and I reckoned a letter had a better chance of finding a person in the know, than I would at the counter.
I explained I was executor administering the estate of the deceased and was selling a property that is part of the estate and I required a tax registration number for the estate so that CGT could be returned.
I gave them my details and the deceased's details including our PPSN's.
Three weeks later I received a letter with a registration number, for CGT purposes, for the estate.
Still waiting for sale contracts to be signed so not in a position to make a return yet. When I am, I will use Form 1 (for a trust or an estate) and use the registration number I have just been given.