Yeah, we rang in last year. Its an automated service & pretty simple.
Just look over the form, write down the few things you need to remember & ring in.
I think its really only confirming ID, TFN, how many primary kids you are claiming for & how many days & how many secondary kids & how many days.
I'm pretty sure it didn't ask what I was claiming for (ie net, computer etc), but can't remember 100%