By Amy E. Feldman

PHILADELPHIA (CBS) - When is the right time to teach your kid the facts of life (by which I mean, Uncle Sam’s gonna take a bite out of that paycheck of yours, junior)? The IRS has an answer.

In 2001, then 14-year-old Sean Belnick borrowed $500 and with the advice of his stepfather started a business selling office chairs online. Now one the largest online-only office furniture stores, the young Mr. Belnick is worth $42 million. Oh! I wish I’d thought of that.

Other than making – or getting your kid to make – $42 million, one other thing you might not of have thought of is this – If your kid makes any money, when and how does he have to file a tax return?

If your kid is listed as a dependent on your tax form, he has to file his own taxes if he’s under 65 and not blind, if he earned income over $5,950 or if he received unearned income over $950 – which is income that he didn’t earn but received from dividends, investments, or from collecting social security or disability and the like.

Of course if your kid is worth $42 million, he can afford the taxes he’ll have to pay on all the money he made.