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Marlin GTX help

Point-of-sale and business management for tyre and mechanical workshops.

Invoice Discounts

Learn about Invoice Discounts in Marlin GTX trusted automotive software by Megabus.

Updated 12 October 2026

Legacy Content

This Legacy Inform content requires revision and may not match your current GTX system. Please check back later for updated information.

Marlin GTX enables you to apply ad hoc discounts directly on an invoice in addition to using Discount Groups.

Note

Megabus must activate this function for you. Please contact your Megabus Account Manager or Megabus Support for further information.

Adding a Discount on an Invoice

When activated, this function enables you to:

  • Enter a Discount ($ or %) directly on particular line items (the total discount will be shown at the bottom of screen)
  • Enter a Discount ($ or %) on the Invoice Total at the bottom of screen (the system will automatically apply the discount across all line items)