Is a non-capital loss the negative amount I got in box 9946-T2125?

[hmarquezh1]

Since 2014 until 2017 I got losses in box 9946-T2125. Are these amounts the non-capital losses? Notice of Assessments 2014 to 2017 don't show these amounts.

I want to claim these negative amounts (losses) for 2018. Is it possible?

I read that I can claim just 3 years back, how could I claim the 2014 loss, as well?

[a3a15603]

Is a non-capital loss the negative amount I got in box 9946-T2125? Yes

Ask an accountant how you go back. I suspect you may need to refile or argue your previous assessments.