Updated Release Testing Instructions WooCommerce 5.3 (markdown)

Release-Testing-Instructions-WooCommerce-5.3.md

@@ -136,4 +136,63 @@ PR: https://github.com/woocommerce/woocommerce/pull/23188
 
 1. Create an order for a downloadable product.
 1. Open the order details in the admin area, and revoke access to the download for the user ("Revoke access" button in the "Downloadable product permissions" box)
-1. Try to grant access to the same product again and the permission is successfully granted.
+1. Try to grant access to the same product again and the permission is successfully granted.
+
+***
+
+## WooCommerce API Updates:
+
+#### Fix taxes endpoint not returning multiple postcodes/cities
+
+PR: https://github.com/woocommerce/woocommerce/pull/27751
+
+
+### How to test the changes in this Pull Request:
+
+1. In WooCommerce admin go to Settings - Tax - Standard Rates and create 3 rates: one with no cities or postcodes specified, another one with one city and one postcode, and one with two cities and two postcodes (separate them with a semicolon, `;`).
+
+2. Temporarily add this at the ned of your woocommerce.php file, this way you won't have to bother about REST API authentication: `add_filter('woocommerce_rest_check_permissions', function() {return true;}, 10, 0 );` (note that this will cause a bunch of unit tests to fail)
+
+3. Retrieve the taxes via the `/wp-json/wc/v3/taxes` endpoint and verity that the results are consistent:
+
+For no city and no postcode:
+
+```json
+ {
+    "postcode": "",
+    "city": "",
+    "postcodes": [],
+    "cities": []
+}
+```
+
+For one city and postcode:
+
+```json
+ {
+    "postcode": "1111",
+    "city": "OSAKA",
+    "postcodes": [
+      "1111"
+    ],
+    "cities": [
+      "OSAKA"
+    ],
+}
+```
+
+For two cities and postcodes:
+
+```json
+{
+    "postcode": "2222",
+    "city": "KOBE",
+    "postcodes": [
+      "1111",
+      "2222"
+    ],
+    "cities": [
+      "OSAKA",
+      "KOBE"
+    ],
+```