If her Binance account is connected to her Latin American bank card, am I right that only Latin American tax agencies will be informed about her crypto assets/ transactions on Binance?
I don't see how a European tax agent would find her on Binance, when it is connected to a Latin American bank card and she does not have a European nationality.
At the moment she is a tax resident in Europe, but we want to move to Latin America around 2030. It is much more attractive for both of us to be tax residents there.
This is what the exchanges do, once you're signing up for opening your account with them, they subject you to KYC at first then later asked you to provide your information like mobile and contact address or a means of identification, all these are what they make use in knowing your regions after checking your ip address form their technical support team, so they already know your country of resident, however for the purpose of migration, the ip address of course will have to change and they will also detect for it, i don't think two tax confirmation would be required, though all these may be subjected to their policies on which of the countries should bill the tax.