Price with Tax not counting after use diferent currency and order step 2

Hello,
i have set:
Display Prices with Tax true
Display Prices with Tax in Admin true
Basis of Product Tax Store

Thios work well until I switch to diferent curency and try to make order
them shop show only Price excluding tax and do not count tax in Oreder steps.

But only one computer witch try it ..:frusty:

:cry:
Please help

By Default , orders from other countries are not valid for Tax , so when you switch currency I assume you are switchng country address also therefore the order should not be valid for Tax . This is how I understand it from a UK address.

The problem was with settings:
Basis of Product Tax Store

/includes/functions/functions_taxes.php
line 28

    if (STORE_PRODUCT_TAX_BASIS == 'Store') {

  if ($zone_id != STORE_ZONE) return 0;
    }

I must changed to:

    
if (STORE_PRODUCT_TAX_BASIS == 'Store') {
       $country_id = STORE_COUNTRY;
        $zone_id = STORE_ZONE;
    }

Zen Cart 1.3.8a
Patch: 1