Left a message saying they've received notice under my name from the ATO informant programme and this is the final reminder to connect with ATO official to resolve tax debt or I will receive further penalties or be arrested. It then says to connect immediately press 1. I didn't return the call but used the landline to dial the number which says it is an invalid number. I don't have any debt with the ATO and I know they communicate via the MyGov website so this is clearly a scam.