Yeah, it’s the identifier the government uses to attribute income for, and hence calculate the resulting taxes. In this case it sounds like a midsize business

Yeah, it’s the identifier the government uses to attribute income for, and hence calculate the resulting taxes. In this case it sounds like a midsize business is using some random guy’s number, so the tax authorities are under the impression there’s a guy pulling in millions personally, and a company with no income. Given that individuals and companies get taxed differently in many different jurisdictions concurrently this will be a mess to untangle.