I want to extract a percentage of the total amount and add it to the footers

[lubos]

Footers will be soon eliminated because new themes can do this job too and better.

You can use theme enhancer to implement this already:

New themes are available

The latest version (25.6.22) adds ability for anyone to customize themes. No programming required. When you view sales invoice, below the sales invoice you will see new section Theme Enhancer [image] When you click on it, it will expand. [image] Theme enhancer will use your current theme as a starting point and you can enter instructions how to improve this. For example, let’s make the theme blue. [image] And the result [image] But it goes beyond simplistic color changes. You can ch…