Hello,

Rounding feature is only for POS Module and nothing to do with decimals. You can set `Rounding` in pos setting as you need. There are options for nearest integer and next integer.

yes,
i had try use nearest integer and next integer, but just can up 1 point, i want round my currency up to 3 digit? where files can i modify

> We can't help with modifications and modified versions you are allowed to do it at your own risk. If you don't know, please hire developer to help you modify the item as you need.

Controllers are in `app/controllers/admin/`, view files in `themes/default/admin/view/pos/` and javascript in `themes/default/admin/assets/pos/js/`