Welcome to the community,
First you should know that version 4 is no longer supported and will never get any future bug fixes or features, additionally it has disappeared from official download mirrors. Version 5 is the current version and recommended version of SambaPOS specifically if you want support on the forum since most of us are using version 5.
Ok so now that I said that… there are some tutorials you can look at. Most of this is version 5 specific but also most of it can be used for version 4 since that was the foundation for version 5 system.
The best tutorial is here:
In addition to that our search function is very powerful:
