Account Invoice - Recompute Tax Lines

This module makes it easy to fix a vendor bill whose tax amounts have become wrong after someone edited values by mistake.

On the supplier invoice (vendor bill) form, a button called "Reset Taxes Computation" appears right after the tax lines area. The button is only visible while the bill is still in draft state, so it cannot be used on posted or cancelled documents.

When clicked, the module removes all existing tax lines on the invoice and then re-runs the standard tax computation from the invoice lines. In practice this means the tax amounts are rebuilt from scratch based on the current lines, taxes and amounts, instead of keeping the old, possibly incorrect values.

• Works on account.invoice records.
• Adds the button to the vendor bill form view (account.invoice_supplier_form).
• No new menus, reports, emails or scheduled actions are added.
• No new fields are created; the module only adds one action button and its behaviour.

It is a small, focused tool for accountants and billing users who need a quick way to reset taxes on a draft vendor bill without manually deleting and re-adding tax lines.