When is the balance of tax due for each of the following entities? Income tax reference: ITA

Question:

When is the balance of tax due for each of the following entities? Income tax reference: ITA 156.1(4); 157(1)(b).
a) A public corporation, resident in Canada.
b) A Canadian-controlled private corporation, with taxable income less than $500,000, and claiming the Small Business Deduction.
c) An individual who carried on business in the year.
d) An individual where no business is carried on by the individual or the spouse.