I have a couple of questions.

Can you mine bitcoins if you are under 18 years of age?

I am located in Wisconsin, USA. I am under 18 years of age. If I earn bitcoins, do I have to pay any sort of tax? Isn't there some sort of threshold that if I pass it, I have to pay the tax?

And, can you calculate the amount of bitcoins you will earn by your hashing rate?

I want to know this before I start mining to see if I should be mining.