What can the tax department do if you don’t file your tax returns? One of the weapons in their arsenal is garnishing wages. If the Canada Revenue Agency (CRA) has sent you letters requesting that you file your tax returns, and you have ignored the requests to file the tax returns; you may find that your pay cheque is less that what it usually is. Most of the cases that we have seen, CRA has garnished wages from 20% to 50%. This is substantial and can dramatically affect your standard of living.