Tax exempt zone

I have a zone that is tax exempt for medical supplies, this is our product base, so that means that all produc ts purchased by individuals from this zone do not pay tax.
I tried to set the tax rate to zero for this zone and obtained an error message.-- Rate: "Tax Exempt (0%)"
I have uploaded an image of what i was trying to do, second image is the error.
??how can i assign a zone to be tax exempt??? Thanks!
-- HikaShop version -- : 2.2.2
-- Joomla version -- : 3.1.4
-- PHP version -- : 5.3.27
-- Browser(s) name and version -- : all
-- Error-message(debug-mod must be tuned on) -- :
0 SQL=UPDATE `x13_hikashop_taxation` SET `category_namekey`='tax_1381882913_1433844422',`tax_namekey`='TAX Exempt',`taxation_cumulative`='0',`taxation_post_code`='',`zone_namekey`='state_Ontario_862',`taxation_type`='individual',`taxation_published`='1' WHERE `taxation_id`='10'

Hi,

The solution will probably be to create a new zone through "HIkashop->System->Zone", and add in this zone ALL where your want your tax to be applied except the zone where you don't want this tax to be applied.

Hi,
I can see that there is a solution for if a product is tax exempt for all, however my issue is that in one specific Zone all transactions are tax exempt.
The Zone exists already, 862-"Ontario", it is of type "States".
All transactions for individuals living in "Ontario" are tax exempt.
When i go into "HIkashop->System->Taxes", I create a new Tax for Zone 856-Ontario with 0% tax rate and i get the same results, an error.

An error has occurred.
0 SQL=INSERT IGNORE INTO `x13_hikashop_taxation` ( `taxation_id`,`category_namekey`,`tax_namekey`,`taxation_cumulative`,`taxation_post_code`,`zone_namekey`,`taxation_type`,`taxation_published` ) VALUES ( '0','tax_1381882913_1433844422','TAX Exempt','0','','state_Ontario_862','','1' )

Thank you so much!

I test it on my end and it worked fine, can you download the last Hikashop version through our website, install it and try it again ?

Hi Mohamad, I downloaded the newest version of hikashop, redid the taxes and it worked perfectly for TAX EXEMPT Zone.
Thank you for your help!