---
title: "Credit Notes | GTX Training"
slug: "credit-notes-bt"
description: "Learn the basics about Credit Notes in Marlin GTX trusted automotive software by Megabus."
updated: 2026-02-04T03:27:36Z
published: 2026-02-04T03:27:36Z
canonical: "help.megabus.com.au/credit-notes-bt"
---

> ## 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.

# Credit Notes BT

****Marlin GTX**** enables customer credits and invoice reversals to be processed using credit notes.

**Credit notes** can be added manually to apply adjustments, or automatically generated by reversing an existing invoice.

All credit notes can be processed using the **Invoices** module.

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

## Adding Credit Notes

Credit notes can be added by clicking on the **Credit Note** button on the left.

In the **Enter Credit Note** window:

- Select the **Salesperson**
- Add products and values using the **Line Details** list
- Click **Finalise** at the top

## Reversing Invoices

#### Main > Data Entry > Invoices > Credit Note

Invoices can be **reversed** by loading the original invoice details into a credit note.

**To reverse an invoice:**

- Select the **Customer**
- Click the **Invoice Reference** picker

In the **Select Invoice** window:

- Select the original **invoice** at the top
- Review the **Transaction Details** below
- Ensure the required line items are ticked
- Click **Select**

The invoice details can be added to the credit note and the credit note can then be **finalised** as usual.

Tip

To insert the full credit amount into a payment type field, click the field and press **Enter**

For Further Details

See the [Customer Credit Notes](/gtx/docs/customer-credit-notes) help guide.