Australia is very similar to this, with the exception of activation codes in the post. Australia is pretty digital-first for their services, so you just sign in

Australia is very similar to this, with the exception of activation codes in the post. Australia is pretty digital-first for their services, so you just sign in with your government ID and navigate to your taxes. Everything is pre-filled. If you have no additional deductions to add in, taxes take around 5 minutes total to file. They have a fairly robust banking system as well so any additional tax you have to pay takes around 60s to send through any bank's mobile app.