Some time ago, I worked in the US, set up a brokerage account and bought some stocks, and soon returned to my home country (Canada). Now I sold some of it, and it occurred to me that I probably need to pay tax on the capital gained. How is this tax normally collected?
If my bank or the IRS tries to send bills to my US address, nobody is monitoring my mail so I won't be able to receive it. They also don't have my address in Canada. Will this potentially cause problems in the future, or can I forget about it and let it take care of itself?
The actual monetary amount is not that big, so I have no problem with paying whatever I owe plus interest, when they ask for it. I just want to make sure it doesn't ruin my credit or cause problems at the border in the future.