If you included foreign income on your return (such as support payments you received from a resident of another country and reported on line 128) that is tax-free in Canada because of a tax treaty, you can claim a deduction for it. If you do not know whether any part of the foreign income is tax-free, contact us, or see Tax Treaties.
Note
Under the Canada-U.S. tax treaty, you can claim a deduction equal to 15% of the U.S. social security benefits, including U.S. medicare premiums, that you included in your income on line 115 - Other pensions or superannuation.
I have a pension from a foreign country. They withhold the taxes. Can I get the tax back?
Enter on line 256, the amount of your foreign income that is tax-free in Canada because of a tax treaty with a foreign country.