Tax (fixed or by country/state/zip)

This plugin allows you to provide your customers with manual tax calculation. You can configure this plugin and choose, whether you will use fixed rate or country rate for your store.

Using “fixed rate” option you can specify tax rate for each product category in your store, if needed. Using “country/state/zip” option you can specify tax rate for a particular country, state or zip.

Installation instructions:

1. Download the plugin archive.
2. Go to admin area > Configuration > Local plugins.
3. Upload the plugin archive using the "Upload plugin or theme" plugin.
4. Scroll down through the list of plugins to find the newly installed plugin. And click on the "Install" button to install the plugin.

Please find more information about how to install plugins here.

Source code:

The plugin is provided absolutely for free and includes source code.