That’s a complicated one and the short answer is, it depends. It depends on your tax residency, ordinary tax residency and tax domicile as well as the source of the income. Some detail on those here: https://mrsmoneyhacker.com/tax-loopholes-for-irish-investors/ – also there is a double taxation treaty between Canada and Ireland which means if you’ve paid tax on something in Ireland but it is due in Canada, you can claim what you paid in Ireland against what you owe in Canada. Best to have a call with a cross border tax specialist to assess what you need for your specific situation.

For us, the majority of the funds were from the sale of our primary residence so there were no taxes or filings due on that. As I am still ordinarily tax resident in Ireland for 3 years, I will owe taxes there on my Irish sourced investment income which I will also declare on my Canadian tax filing and claim back what I paid in Ireland as a credit. Hope that makes some sense?