Account Product - Fiscal Classification

Instead of choosing sale and purchase taxes one by one on each product, you create a "Fiscal Classification" that groups a purchase tax set and a sale tax set. On a product you then pick a single Fiscal Classification, and the sale and purchase taxes are filled in automatically and shown as read-only.

In Accounting you get two new menus: "Fiscal Classifications" and "Fiscal Classification Rules". A classification has a name, an optional description, an optional scope (Services or Goods) that limits which taxes can be chosen, and an optional company. It shows how many products use it, and a button opens that product list. A button lets an accounting manager move all those products to another classification at once through a small wizard.

Rules link product categories to classifications with an action: Allow or Forbid. When a product is saved, the rules are checked; if a forbidden combination is used, saving is blocked with an error message (the rule's message is shown). Account managers bypass these checks. Deleting a classification that still has products is refused.

When you change the taxes directly on a product, the module looks for a matching classification and creates one if none exists. On installation, existing products are grouped into classifications automatically.