How to report foreign income that's part of T4 to claim the foreign tax credit?

[joycexd.ca]

I'm a US citizen living in Canada and filing canada tax as a canadian resident. A portion of my T4 is foreign income from US. How should I report this T4 income to claim foreign tax credit? I want to make sure 1) The right amount is reported as foreign employment income; 2) this foreign employment income is not double counted.

[TurboTaxSusan]

T4 slips are issued when there have been deductions from the employee’s pay that go towards the Canadian Pension Plan (CPP) (or the Quebec Pension Plan QPP), Employment Insurance (IE), Income taxes or Provincial Parental Insurance Plan. So the income on the T4 is considered to be Canadian income, even if it was paid by a foreign company.

Is it possible that your employer also has a US slip that has your US income on it?