nope, no pre-registration needed - and yes, waiting til the end of the year would be my suggestion. if kinder is 10 hours a week, you might get all of $6.50 (rounded up) per week, maybe $10 for a 15 hour week... it's best to wait and do it all at once. just make sure you have completed and returned the claim within one year of the first date you use care (so if it starts from Feb 2013, get your claim in by end of jan 2014)