---
title: "Purchase Invoices | GTX Suppliers"
slug: "purchase-invoices"
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"
---
> ## 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
**{{variable.GTX Bold}}** 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.
:::(Info) (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**.
@(Embed)(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 **{{glossary.picker}}** (magnifying glass) icon to select the product (or press F4)
*  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 **{{glossary.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.
:::(Info) (Note)
By default, costs are shown as excluding GST, but the **Show/Hide GST** button  can be used to toggle between excluding and including GST.
:::
:::(Warning) (Tip)
Supplier contact details can also be viewed by clicking **Show Supplier Details** and closed by clicking **Hide Supplier Details**.
:::
:::(Warning) (Tip)
Entire purchase order details can be quickly added to supplier invoices by clicking on the down-arrow next to the {{glossary.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.
:::(Error) (Example)
Select **Telephone Landlines** for a phone bill, or **Plant and Equipment** for equipment purchases.
:::
:::(Info) (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).
:::