You don't need to pay an expert for tax matters. Just call the tax office in your country and ask them.
It's their job to inform people about such matters and it's free or I should rather you're already paying them.
You just have to explain to them your situation, that you are going to move to another country and that you want to know when you are supposed to pay taxes.
That'd be dangerous in my country, you gotta have that in writing.
Another thing to consider are exit taxes in some countries which can make moving with wealth more difficult.