Tax Question for CANADIANS (Ontario preferably) ONLY?

I am not aware of any refundable tax credits for your age. All the credits I've ever known about are for age 18+ (such as GST) and I have been a tax preparer for 17 years - although in BC, not ON. The guy at H&R is probably just wanting to get your business (you would have to pay them to complete a tax return for you before you would find out if you get a refund). I would trust the answer from the tax hotline more.