I have a client in Ontario, Canada, who is requesting an installation of oscommerce. No problem. What I need is the GST contribution for oscommerce installed. Ontario has a provincial tax. Canada has a federal tax (called the GST). They are not harmonized (meaning that we can't simply use a 15% tax and call it even). Ontario tax will only apply to the client's customers living in Ontario (fairly normal) but GST applies to all customers clients residing in Canada. There will be no tax for US customers. We have installed this contribution once before for a client in Ontario, so there is someone in our office who is familiar with the working of (a) the tax system generally and (b) the contribution. However, we are overworked with contributions installations and HTML web design, hosting, admin, etc., and hoping to contract out all oscommerce contributions work. We have not given a price for this contribution installation to the client yet, so we can work in your guidelines. I expect the client is hoping to have installation completed on or before Friday, February 25, but that can be negotiated. Please pm me if you have questions.