diff --git a/packages/mojatax/ast.json b/packages/mojatax/ast.json
index 7ade7b611..05a8ff3d0 100644
--- a/packages/mojatax/ast.json
+++ b/packages/mojatax/ast.json
@@ -13,8 +13,8 @@
         "tags": [
           {
             "title": "example",
-            "description": "post(\"patient\", { \"name\":\"Bukayo\" });",
-            "caption": "Make a POST request create an invoice"
+            "description": "post(\"CreateInvoice\", {\ninvoice_id: 'PID092',\ncustomerId: '102',\nitems: [],\n});",
+            "caption": "Make a POST request to create an invoice"
           },
           {
             "title": "function",
@@ -75,7 +75,7 @@
           },
           {
             "title": "state",
-            "description": "{HttpState}"
+            "description": "{MojataxHttpState}"
           }
         ]
       },
@@ -95,8 +95,8 @@
         "tags": [
           {
             "title": "example",
-            "description": "request(\"POST\", \"patient\", { \"name\":\"Bukayo\" });",
-            "caption": "Make a POST request create an invoice"
+            "description": "request(\"POST\", \"/client/CreateInvoice\", {\ninvoice_id: 'PID092',\ncustomerId: '102',\nitems: [],\n});",
+            "caption": "Make a POST request to create an invoice"
           },
           {
             "title": "function",
@@ -166,7 +166,7 @@
           },
           {
             "title": "state",
-            "description": "{HttpState}"
+            "description": "{MojataxHttpState}"
           }
         ]
       },
diff --git a/packages/mojatax/src/Adaptor.js b/packages/mojatax/src/Adaptor.js
index 7249080bf..4cb766f9a 100644
--- a/packages/mojatax/src/Adaptor.js
+++ b/packages/mojatax/src/Adaptor.js
@@ -58,26 +58,7 @@ export function execute(...operations) {
  * post("CreateInvoice", {
  * invoice_id: 'PID092',
  * customerId: '102',
- * customerIdType: '6',
- *  customerName: 'MojaONe LTD',
- *  mobileNumber: '0787640622',
- * items: [
- *   {
- *    id: 1,
- *   desc: 'Solar Panel',
- *     qty: 3,
- *     taxcode: 1,
- *     amt: '5000.00',
- *   },
- * ],
- * totals: {
- *   totaltaxincl: '15000.00',
- *  discount: '0',
- * },
- * payments: {
- *   pmttype: 'INVOICE',
- *   pmtamount: '15000.00',
- * },
+ * items: [],
  * });
  * @function
  * @public
@@ -98,26 +79,7 @@ export function post(path, data, options, callback) {
  * request("POST", "/client/CreateInvoice", {
  * invoice_id: 'PID092',
  * customerId: '102',
- * customerIdType: '6',
- *  customerName: 'MojaONe LTD',
- *  mobileNumber: '0787640622',
- * items: [
- *   {
- *    id: 1,
- *   desc: 'Solar Panel',
- *     qty: 3,
- *     taxcode: 1,
- *     amt: '5000.00',
- *   },
- * ],
- * totals: {
- *   totaltaxincl: '15000.00',
- *  discount: '0',
- * },
- * payments: {
- *   pmttype: 'INVOICE',
- *   pmtamount: '15000.00',
- * },
+ * items: [],
  * });
  * @function
  * @public
diff --git a/packages/mojatax/src/Utils.js b/packages/mojatax/src/Utils.js
index 4b07bce08..b10fb7fd1 100644
--- a/packages/mojatax/src/Utils.js
+++ b/packages/mojatax/src/Utils.js
@@ -7,25 +7,26 @@ import {
 import nodepath from 'node:path';
 
 export const authorize = state => {
-  const auth = state.configuration;
+  const auth = state.configuration ?? {};
   if (auth.access_token) {
     return state;
   }
-  const clientId = auth.clientId;
-  const password = auth.password;
+
+  const { clientId: client_id, password } = auth;
+
   const headers = {};
 
-  if (clientId && password) {
+  if (client_id && password) {
     Object.assign(headers, {
       'Content-Type': 'application/json',
     });
 
     const body = {
-      client_id: clientId,
-      password: password,
+      client_id,
+      password,
     };
     const options = {
-      body: JSON.stringify(body),
+      body,
       headers,
       method: 'POST',
       parseAs: 'json',
@@ -62,7 +63,7 @@ export const prepareNextState = (state, response, callback = s => s) => {
 };
 
 export const request = (configuration, method, path, options) => {
-  const { baseUrl, access_token } = configuration;
+  const { baseUrl, access_token } = configuration ?? {};
 
   const { data, params = {} } = options;
 
diff --git a/packages/mojatax/test/Adaptor.test.js b/packages/mojatax/test/Adaptor.test.js
index 6750b3289..a9b4d0ad6 100644
--- a/packages/mojatax/test/Adaptor.test.js
+++ b/packages/mojatax/test/Adaptor.test.js
@@ -28,47 +28,7 @@ before(() => {
     .persist();
 });
 
-describe('execute', () => {
-  it('executes each operation in sequence', async () => {
-    const state = {
-      configuration,
-    };
-    const operations = [
-      state => {
-        return { counter: 1 };
-      },
-      state => {
-        return { counter: 2 };
-      },
-      state => {
-        return { counter: 3 };
-      },
-    ];
-
-    const finalState = await execute(...operations)(state);
-
-    expect(finalState).to.eql({ counter: 3 });
-  });
 
-  it('assigns references and data to the initialState', async () => {
-    const state = {
-      configuration,
-    };
-
-    const finalState = await execute()(state);
-
-    expect(finalState).to.eql({
-      configuration: {
-        baseUrl: 'https://fake.mojatax.server.com',
-        clientId: 'someclientid',
-        password: 'somepassword',
-        access_token: 'fake-token',
-      },
-      references: [],
-      data: null,
-    });
-  });
-});
 
 describe('request', () => {
   it('makes a post request to the right endpoint', async () => {
@@ -97,14 +57,16 @@ describe('request', () => {
 });
 
 describe('post', () => {
-  it('should create an invoice', async () => {
+  it('posts to /CreateInvoice', async () => {
+
     testServer
       .intercept({
         path: `/api/v1/client/CreateInvoice`,
         method: 'POST',
       })
 
-      .reply(201, () => {
+      .reply(201, (req) => {
+        expect(JSON.parse(req.body)).to.haveOwnProperty('customerId');
       return { id: 7,"customerId": "102", }
       });
 
@@ -113,7 +75,7 @@ describe('post', () => {
     };
 
     const { data } = await execute(
-      post('CreateInvoice',{
+      post('CreateInvoice', {
         "customerId": "102",
         "invoice_id": "PID092",
       } )