You have filed your returns but didn't have the money to pay what was owed. You may think, "Oh well---I will catch up next year." Before you know it you find yourself several years in arrears and suddenly there is a notice from the CRA, stating that you owe three or four times the original amount.
It's truly amazing how fast tax penalties and interest add up. Now
you have a choice, you can write a big fat check and pay the full amount,
including interest and penalties. Or you can just keep
ignoring them while the penalties and interest keep piling
up.
