The system will default to displaying 2 decimal places in your parts detail screen, however there is a system option which will allow you to display up to 4 decimal places.
In the Parts Module, click System, then System Options.
In the General Settings, tick the box for B2B (show Ex + GST).
From Eclipse build 2019.25.35 onwards, you are now able to select decimal places per part in the edit part screen
