The tax changes that occured in Ontario in July 2010, have affected how we are required to collect taxes in Canada. We are now required to collect HST based on the rate in the province in which the product in shipped, and GST only in provinces that do not have the blended HST. The following link on the federal government website gives examples. http://www.cra-arc.gc/tx/bsnss/tpcs/gst-tsp/gnrl/hst-tvh/gds-eng.html