# Specifying GST amounts (AU) - eg. airfares **URL:** \ **Category:** Uncategorized\ **Created:** [October 29, 2013, 7:12am UTC](https://forum.manager.io/t/specifying-gst-amounts-au-eg-airfares/157 "2013-10-29T07:12:47Z")\ **Posts on this page:** 4\ **Page:** 1
**Author:** ![rocketman\_68](https://avatars.discourse-cdn.com/v4/letter/r/74df32/32.png) [@rocketman\_68](https://forum.manager.io/u/rocketman_68)\ **Post date:** [October 29, 2013, 7:12am UTC](https://forum.manager.io/t/specifying-gst-amounts-au-eg-airfares/157/1 "2013-10-29T07:12:47Z")
Hi - Airfares have complex taxation. They do have GST, but they also have a number of other taxes and charges, so the GST is not 10% of the total fare. Is there a way of inputting the GST component from the airline’s tax invoice manually rather than having it automatically calculated? ---
**Author:** ![lubos](https://sea1.discourse-cdn.com/flex019/user_avatar/forum.manager.io/lubos/32/62798_2.png) [@lubos](https://forum.manager.io/u/lubos)\ **Post date:** [October 29, 2013, 8:13am UTC](https://forum.manager.io/t/specifying-gst-amounts-au-eg-airfares/157/2 "2013-10-29T08:13:16Z")
You need to split the amount into GST and GST-free portions. So let’s say if airfare is $1,000 and $100 is GST-free, then you need to split the amount so only $900 is subject to GST 10% and remaining $100 is marked with GST-free tax code. ---
**Author:** ![rocketman\_68](https://avatars.discourse-cdn.com/v4/letter/r/74df32/32.png) [@rocketman\_68](https://forum.manager.io/u/rocketman_68)\ **Post date:** [October 29, 2013, 9:56am UTC](https://forum.manager.io/t/specifying-gst-amounts-au-eg-airfares/157/3 "2013-10-29T09:56:05Z")
Good workaround! A bit of backward engineering is required to work out the GST-component, but I’ll have a go. Thanks for prompt reply! ---
**Author:** ![Ealfardan](https://sea1.discourse-cdn.com/flex019/user_avatar/forum.manager.io/ealfardan/32/63166_2.png) [@Ealfardan](https://forum.manager.io/u/Ealfardan)\ **Post date:** [January 18, 2023, 3:42pm UTC](https://forum.manager.io/t/specifying-gst-amounts-au-eg-airfares/157/4 "2023-01-18T15:42:20Z")