The worst thing was when I moved from the US to Canada one year, and from Canada to the US the next. Both years I had to file tax returns in both countries, an

The worst thing was when I moved from the US to Canada one year, and from Canada to the US the next. Both years I had to file tax returns in both countries, and various amounts had to be prorated based on the number of days of the year that I was a Canadian resident. And my Canadian wages had to be converted to USD based on the exchange rates from each day I received a paycheck.... And yeah, none of my US banks or credit card companies could handle my Canadian address on their web sites.