When Employees Must Receive Their 2010 Slips If you are an employee, businesses are supposed to prepare and file the necessary slips and provide or mail their employees these slips prior to or postmarked by February 28, 2011. Because some mail their slips at the last minute, employees may not receive the slips until the first week of March. However, T3, T5013, and T5013A slips do not have to be sent before the end of March so you may want to wait until April 1st before you bring all of your slips to your accountant, or file your 2010 Income
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