I did my taxes with my accountant. She told me how much I would owe but that when she efiled my claim, the gov't would send out the official "bill" I owed and the EI would be added to that. I just received my bill yesterday and I had to pay $300 for EI which they stated on the top half of the page where they have notes about your claim and such plus the amount that I knew I already needed to pay.