Hi,
It is because our Slider has been built based on US Standards, in here, all prices show in the websites are TAX excluded, but there is an easy patch for this.
See the attached ZIP file and unzip it in your computer.
Attachment SliderTAXIncludedPatch.zip not found
You will get 1 file (helper.php)
Replace it with the one you have in this path:
ROOT/modules/mod_vm_flexible_slider/helper.php
And the prices will be TAX included.
Regards.
Forum Support.