If you receive benefits from a Wage Loss Replacement Plan such as Short-Term Disability (STD), Long-Term Disability (LTD), or Weekly Indemnity (WI), you will receive a T4a and report these amounts on Line 10400 of your tax return.
How do you enter a T4A slip for the TurboTax online edition:
See Below:
Please check out the Canada Revenue Agency article: Wage loss Replacement Plan
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The union said I will not get a T4 or any form because no tax was taken off.