A supplementary unemployment benefit plan is sometimes referred to as a guaranteed annual wage plan. It is set up by your employer (or group of participating employers) to top up your Employment Insurance (EI) benefits. You may have a period of unemployment because of training, sickness, accident or disability, maternity or parental leave, or a temporary stoppage of work.
Enter on line 104, the amount shown in box 152 of your T4A slips.