I've had the same call from several different numbers, all mobiles. I was also told that there was a federal warrant out for me in relation to this as well on each occasion.

I'm pretty sure this was a scam, used a robotic voice several seconds after I answered saying it was from the legal tax department and was suspending my tax number for illegal activities and that in order to avoid getting arrested I was to press 1 on the dial pad. I didn't respond at all or press the number and a few seconds later the call was dropped on their end.