Usually, purely “administrative” tax issues are not for Interpol. But if they call it “tax fraud” or “evasion,” then it becomes a criminal matter. You should check the info on extraditionlawyers.net about what counts as an Interpol-eligible crime. Many countries use this to pressure people to pay up. If you can prove it is just a civil dispute over numbers, you can get the notice blocked. It is all about how the charges are framed in the warrant. You need a lawyer who can argue that this is a “fiscal” offense which some treaties do not cover. Do not ignore it, because once the red flag is up, the bank and the border guards won’t care about the details – they will just see the “fraud” label.