I've received a big tax bill for a family trust that we closed a few years ago. It didn't trade for 10 years and apparently we didn't do all the tax returns ( but did all the bas). This was a final demand letter, but I've never received any letters before now. If I'd received one on 2006 I'd have done something about it.

Does anyone have any advice? I called the ato today, was on hold for 95 mins and was then told my name wasn't on the "speak to list" so they couldn't tell me anything. Do I have a leg to stand on if I try to appeal this?