What do I do if I'm separated and I don’t know my ex-spouse’s income amounts for the year?

Unfortunately, you still have to estimate and enter amounts, based on what you know. For example, if you have a separation agreement, you might be able to estimate your ex-spouse’s income from there.

Keep in mind, if you enter amounts that are too low, you might end up claiming benefits that you’re not entitled to, or receiving amounts that are higher than they should be. This might result in the Canada Revenue Agency (CRA) wanting these benefits back, and having to pay interest charges and penalties.