Accountant to help to start a business to buy and sell cars on my firm

Toelichting op de werkzaamheden:
Im going to buy and sell cars on my firm. What kind of documents I need, what I need to know to start practicing this, from A-Z.
I live in Netherlands. I am registered hier in Netherlands and I have sofi number too.
In beginning I want to open a company that buys and sells cars to EU countries.
I will start alone buying and selling cars on my firm.

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Deadline: Graag zo spoedig mogelijk