Hi,
The price edition have two different modes, a "classical" and a "minimal".
The minimal design is used when the "currency", the "quantity" and the "acl" are not available.
Otherwise the "classical" design is used.
Even if the vendor can't edit the tax, it does not means that there is no a tax for the product (in the product template for example).
So the price with tax is display and available, to help the vendors to configure the price. It is something on purpose.
How many currencies do you have in your website ?
Do you want the vendors configure the prices for all currencies ?
Did you test the price edition without the "currency" ? Maybe the design will be more appropriate to your requirements.
To make a fast fix, it is something you can override in the price edition.
In the view "productmarket | form_price" you can remove the blocks
<th class="title"><?php
echo JText::_('PRICE_WITH_TAX');
?></th>
<td class="hikam_price">
<?php echo $pre_price; ?><input size="10" type="text" id="hikamarket_price_<?php echo $i;?>_with_tax" name="price_with_tax_<?php echo $i;?>" value="<?php echo @$price->price_value_with_tax; ?>" onchange="window.productMgr.updatePrice(<?php echo $i; ?>, true)"/><?php echo $post_price; ?>
</td>
And replace the content
window.productMgr.updatePrice = function(id, taxed) {
/* Remove the javascript+php which is here */
}
if(!window.productMgr.cpt)
window.productMgr.cpt = {};
In order to not make the ajax call when the price without tax is modified.
Regards,