MAGETWO-55301: Enable tax rate calculation on address change without shipping methods

Author: pdohogne-magento

app/code/Magento/Tax/view/frontend/web/js/view/checkout/summary/tax.js

@@ -21,7 +21,9 @@ define([
         isZeroTaxDisplayed = window.checkoutConfig.isZeroTaxDisplayed;
 
     quote.shippingAddress.subscribe(function () {
-        totalsDefaultProcessor.estimateTotals(quote.shippingAddress());
+        if (quote.shippingAddress().isEditable()) {
+            totalsDefaultProcessor.estimateTotals(quote.shippingAddress());
+        }
     });
 
     return Component.extend({