Do I have to republish the web site every time I edit shipping or tax information?

No, when you edit details like product pricing, tax, and shipping, you should not need to “publish” the web site design again in PowerWebBuilder. When you next visit the web site, the changes should be reflected. If they are not, try hitting “refresh” or “reload” on your browser, or make sure you are not visiting a bookmarked page with a previous shopper id in the url. If this refreshing does not work, try clearing your browser cache.