MAGETWO-90539: Fixed Tax doesn't show in any total or tax field of cart during checkout.

Author: fascinosum

app/code/Magento/Checkout/view/frontend/web/js/model/new-customer-address.js

@@ -17,17 +17,23 @@ define([
      */
     return function (addressData) {
         var identifier = Date.now(),
+            countryId = addressData['country_id'] || addressData.countryId || window.checkoutConfig.defaultCountryId,
             regionId;
 
         if (addressData.region && addressData.region['region_id']) {
             regionId = addressData.region['region_id'];
-        } else if (addressData['country_id'] && addressData['country_id'] == window.checkoutConfig.defaultCountryId) { //eslint-disable-line
+        } else if (
+            /* eslint-disable */
+            addressData['country_id'] && addressData['country_id'] == window.checkoutConfig.defaultCountryId ||
+            !addressData['country_id'] && countryId == window.checkoutConfig.defaultCountryId
+            /* eslint-enable */
+        ) {
             regionId = window.checkoutConfig.defaultRegionId || undefined;
         }
 
         return {
             email: addressData.email,
-            countryId: addressData['country_id'] || addressData.countryId || window.checkoutConfig.defaultCountryId,
+            countryId: countryId,
             regionId: regionId || addressData.regionId,
             regionCode: addressData.region ? addressData.region['region_code'] : null,
             region: addressData.region ? addressData.region.region : null,