From reading their page and watching a talk I don't quite get how they merge taxation and anonymity. As I understand it what individual transactions are for is

From reading their page and watching a talk I don't quite get how they merge taxation and anonymity. As I understand it what individual transactions are for is protected but the total money flows are available and thus taxable? I take it they have categories (capital gains, income) etc. attached to the money streams since they are taxed differently in most countries? That would open the possibility to do some metadata/timing etc. analysis and at least some of that anonymity would get leaked. I would also have to prove somehow that this transaction was for example a capital gains transaction etc. Similarly I don't see how sales taxes are handled. That would require a somewhat specific location identifier on my part, would it not (in the U.S. you'd need to provide your state)? I'm also not sure how tax deductions would work. For those I usually have to turn in receipts and declare why the content of the items is relevant for the work. Let's say I want to buy a book that I think could be flagged for political reasons and would want to keep the fact that I bought that book secret. I'd still have to prove that it was purchase of an item (possibly even indicating a book depending on how complicated the tax code is). It feels like in practice it would be a rather soft layer of anonymity. I don't know I feel like I just don't get how taxation and anonymity can be merged as soon as the tax code gets complicated a lot of information needs to be leaked.