You do not have to report certain amounts in your income, including the following:
Non-Taxable Amounts still Reported on Income Tax Returns
There are certain amounts that must be included in income, and then deducted from income on ones tax returns. This is done to reduce or eliminate some benefits the taxpayer would receive had the amount not been included in income, and then removed as a deduction.
The following would be reported on Line 147 (other payments)
Line 250 deducts the above from Line 147. This means it is included on Line 234 which is net income before adjustments. Line 234 is used to calculate the working income tax benefit, the medical expense tax credit, and many more.
Windfalls
Cranswick v. The Queen, [1982] CTC 69, (FCA)
If you receive money, the above Federal Court of Appeal case will dictate whether that money is a windfall and thus non-taxable. The factors that must all be present are:
CRA Resources
Income Tax Folio S3-F9-C1: Lottery Winnings, Miscellaneous Receipts, and Income (and Losses) from Crime
See the Canada Revenue Agency (CRA) page on amounts that are not taxed.
A complete list of income that is not taxed can be found in the Income Tax Act, in s. 81, amounts not included in income.