Tax office will always send a letter in the mail with a reference number, when they eventually call, they will quote that number before asking to verify your details.

I missed the call but they left a voice message. No sound at the start then a random muffled laugh? then nothing again.
Been getting a lot of scam calls lately.

spam marketing - spoke to someone and told them to not call

I picked up and they hung up. Scam!

Just hang up

Just hung up.

Calls and didn’t pick up, seemed a bit sus when no message was left

Probably another scam type caller

Sounded like a digitised voice telling me I was about to be arrested for tax fraud, then ended with 'have a blessed day' I didn't call back!