Form a corporation, limited liability company (LLCs), limited partnership or more and do business in New York State. You must file Form 2553 within two months and 15 days of the beginning of the tax year that you want your S corp tax treatment to start.Incorporate an international company or an LLC in the the Cook Islands. Set up an offshore company in the Cook Islands and open a bank account. Find out what takes place in the formation of a corporation and the resulting tax responsibilities and required forms.