There are no tax on bitcoins as no one control the bitcoins there is no questions of tax.
Haven't you taken the effort to browse through the last few pages of this thread in order to read what people are saying? Bitcoin being decentralized doesn't mean you don't have to pay tax. In your country you have to pay tax over everything you own. Bitcoin is money, and thus it adds up to your fiat wealth where you normally pay tax over. In that regard, you also have to pay tax over your coins.
Great example;
Whether you have 10BTC that is valued at $6290 right now, or just that amount in money, it doesn't matter since Bitcoin is also money.
However transaction fees will always required as it will be the only income for the service provider.
This thread has nothing to do with fees, so I am not sure why you bring that up here.