This is a simple add-on for product information page. It will allow you to show price both with, without tax and NO tax as a subset of the main setting. This way the customer is always aware of what the prices is.
It requires NO core changes so just copy over the files provided.
Once it’s installed simply go to admin and install and turn on.
Has only been tested on Phoenix 188.8.131.52
That’s is Enjoy..