We are trying to change some small things on the olla cart ([url removed, login to view]) system that integrates with our oscommerce web site. Olla cart works great and it integrates with oscommerce without any changes to the database or oscommerce files. The problem is it only will use 1 tax rate and does not use any of the other tax rates. It uses the default tax rate in oscommerce. We need two taxes for sales in our store. So what we want is to add two database tables 1 for our GST tax and 1 for PST tax and and have the Olla Cart system use them instead of the oscommerce default. I don't need to be able to change the tax rates throught the Olla Cart system as long as we can change it using PHPmyAdmin it will be fine.
So to recap below are the changes listed.
1.) Database changes. Add GST tax rate and PST tax rate.
2.) Change Olla Cart to use new database tables instead of standard oscommerce ones.