You are a self-employed individual, you performed for the firm and invoice it, your employer pays for your service and gets deduction on operating expenses, you report income on your T1 according to the invoices, in which case you can deduct employment related expenses including telephone, cable, cell phone, part of autoexp, and toilet paper

perhaps your boss doesn't really know what's going on, and reject any T forms he offers, that's hard evidence that you want to avoid at all cost...

关于自雇人士自己购买EI，建议你同政府机构电话咨询一下，这个我不是太清楚，只记得有人这样买过，要不失业了，生小孩怎么办？有什么结果能否在这里公布一下?我相信不少人都有相同的困惑。说不定我很快也去做contract 呢。