There are different types of corporations for tax purposes, and you have to select the one that accurately describes your corporation type at the end of the tax year. The corporation type determines whether or not the corporation is entitled to certain rates and deductions. Make sure you know which type applies to you.
A change of corporation type may result in significant tax consequences. For example, certain calculations on the return depend on whether the corporation was a private corporation or a Canadian-controlled private corporation (CCPC) throughout the tax year, at any time in the tax year, or at the end of the tax year.