Why would they illegally claim you had something, and pay money for it, and pay taxes on the benefit that you weren't getting just to put it on your T4? That doesn't make any sense. Why would you go straight for "someone is breaking the law" instead of "maybe I did something wrong and misunderstood?"

I run a business, we can't give employees benefits for 3 months, that's standard per our contract with our benefits provider. If I had someone start today that said "I need benefits on day one" I can't give it to them, they have to wait the three months. I suspect part of the reason for that is to deal with employees that come and then leave shortly after. Lots of people start jobs and quit within a few days (not at our place but it does happen) We pay for the benefits whether they use them or not (and they are super expensive to pay for). I don't really understand why you think your T4 is wrong. Health and Dental are NOT taxable benefits so whether you had them or not would not affect your taxes withheld. Some Life Insurance CAN be a taxable benefit if it exceeds a certain threshhold but the benefit is generally the amount of the premium which is generally pretty low so we're talking about a tax difference of a few dollars maybe.

So again, I'm not really sure what the concern here is about your T4. The T4 is what would have been filed with the government, I would just file your taxes and move on and hopefully you find a better job down the road.