u/993love

Any advice on this appreciated.

I'm an American (sorry!) but wife is Canadian (yay!). Her 24 yo son has dual citizenship. Two years ago I opened a brokerage account on his US Social Security number and he filed US taxes in 2024 and 2025. Those had his only income -- capital gains from equities sold from his US account. My wife's corporate tax person said he has to claim those capital gains as income on his Canadian taxes.

This doesn't seem right to me. He's claiming them as income on his US taxes and it has nothing to do with Canada. The gains were in USD and put in his US credit union account. No money ever touched Canada.

Is this right?

Thanks :-)