Depends on what country you're living in. You'd have to check if you need to.
Where I'm from when you're into bitcoin you have to report that you are and how much you've made, depending on how much profit you got, you'd have to pay taxes over that.
I thought taxes the guy meant that were fees, but I was wrong. and I thought bitcoin has not taxes, but it has.
well I think it means that bitcoin is legal already in your country if you have to pay taxes.
In my country we don't need to pay taxes of bitcoin.
That's why the government will never allow bitcoin exists and is developing in their country. and prohibit/illegal the use of bitcoin. because the government can not give taxes to bitcoin because bitcoin is very secret and very anonymous identity and allows a lot of the corruptors flexibility to use bitcoin for illegal activity