If you have company with big turnover, best to work as a company rather then self employed. As a company you have limited liability to start with and you can deduct far more a lot easier.

Also an Sàrl or SA looks far better than self employed individual person

Numerous other advantages but all depends on what you do and the $$ involved, why don'tr you just go and pay for an hour with an accountant who will tell ypou whats best for your indivdual case.