If i sell my bitcoins to a site like coinbase at the end of the year do I need to declare that sale to the vat department and pay the 20% on what i received from coinbase ?
where are you living actually tax completely depends on that country rules and regulations so you have to keep hold you are bit coin in a wallet. then after try to sell it. but it is depends on country tax only. in my country i have to pay tax really it is very high in my country. if suppose how much your bit coin price like it's price high then you have to pay high tax your bit coin price is low then you have to pay low tax. so tax depends on your earning.