---
title: "Purchase Invoices"
slug: "purchase-invoices-1"
description: "Learn about Supplier Invoices in Marlin GTX trusted automotive software by Megabus."
tags: ["Marlin GTX"]
updated: 2026-03-20T03:03:00Z
published: 2026-03-20T03:03:00Z
canonical: "help.megabus.com.au/purchase-invoices-1"
---

> ## Documentation Index
> Fetch the complete documentation index at: https://help.megabus.com.au/llms.txt
> Use this file to discover all available pages before exploring further.

# Purchase Invoices

****Marlin GTX**** enables the recording of supplier invoices, expenses and assets using the Purchases module.

The Purchases module can be accessed by selecting **Main > Data Entry > Purchases** from the menu bar.

Note

The Purchases module can also be used with **Delivery Dockets** to receive stock before invoicing.

See the [Delivery Dockets](/gtx/docs/delivery-dockets) help guide for further information.

## Invoicing Purchases

#### Main > Data Entry > Purchases

Purchases can be invoiced to **record supplier charges** and **bring products into stock**.

[Video](https://cdn.document360.io/d7282b31-60c4-41e6-bf87-3f684d4da049/Images/Documentation/6.2EnteraSupplierInvoice.mp4)

By default, the Purchases module will open on the **Supplier Tax Invoice** screen.

Click on **Supplier Tax Invoice** in the New Transactions section on the left if required.

In the **Enter Supplier Tax Invoice** screen:

- Select the **Supplier**
- Enter the **Supplier Invoice Number**
- Select the **Salesperson**
- Select the **Date** for the transaction
- Enter the **Total Invoice Amount**
- Press **Tab** on the keyboard
  - The **GST amount** will be automatically calculated

Use the **Line Details** list to add products:

- Click on the **picker** (magnifying glass) icon to select the product (or press F4)
  - ![Image](https://cdn.document360.io/d7282b31-60c4-41e6-bf87-3f684d4da049/Images/Documentation/image-LKYBQ2B9.png) Click on **Use Catalogue Code** or **Use Product Codes** at the top to switch between code types, if required
- Add to the **Description**, if required
- Enter the **Quantity**
- Click the **Add** button at the top to add a new line and **repeat**, if required
- Click **Finalise** (top of module) and confirm
  - Enter a **Payment Due Date**, if required

The **Total Invoice Amount** will be added to your outstanding balance with the supplier.

Any products on the invoice will be **brought into stock** and can be sold as usual.

Note

By default, costs are shown as excluding GST, but the **Show/Hide GST** button ![Image](https://cdn.document360.io/d7282b31-60c4-41e6-bf87-3f684d4da049/Images/Documentation/image-7TMN6FX9.png) can be used to toggle between excluding and including GST.

Tip

Supplier contact details can also be viewed by clicking **Show Supplier Details** and closed by clicking **Hide Supplier Details**.

Tip

Entire purchase order details can be quickly added to supplier invoices by clicking on the down-arrow next to the Add button and selecting **Import Purchase Order**.

### Non-Inventory Expenses

#### Main > Data Entry > Purchases

Non-inventory expenses or business assets can also be added to supplier invoices by selecting an **Expense Code** or **Asset Code** when selecting a product to add to the invoice details list.

Example

Select **Telephone Landlines** for a phone bill, or **Plant and Equipment** for equipment purchases.

Note

Expense and asset codes must be added as products before they can be selected. See [Product Maintenance](https://help.megabus.com.au/gtx/docs/products-maintenance).

Pickers open picklists by clicking on the **Magnifying Glass** icon

![](https://cdn.document360.io/d7282b31-60c4-41e6-bf87-3f684d4da049/Images/Glossary/image-1718933572607.png)

Shortcut: **F4**

**Add** button

![](https://cdn.document360.io/d7282b31-60c4-41e6-bf87-3f684d4da049/Images/Glossary/image-1704776179584.png)

Shortcut: **Insert**