Hi Wren,

Understanding the math first

• ₱1,203.04 × 12% = ₱144.36 -> This is tax excluded (tax on top of base amount)
• ₱1,203.04 ÷ 1.12 × 12% = ₱128.90 -> This is tax included (tax extracted from amount) <- Odoo is doing this

So Odoo is still treating your amount as tax inclusive, meaning it considers ₱1,203.04 as the total (base + tax already inside).

Possible reasons & fixes

1. Cache/recompute issue After changing price_include_override, delete the expense and re-enter it. Existing records may not recompute automatically.

2. Check the tax configuration directly Go to Accounting → Configuration → Taxes, find your 12% VAT and verify:

• Tax Computation -> Percentage of Price
• Tax Type -> Sale or Purchase (correct one for expenses)
• Price Include Override -> Tax Excluded

Also check that no fiscal position is overriding this tax behind the scenes.

3. The Expenses module may use a separate tax The tax applied in Expenses might be a different tax record than the one you edited. Check the actual tax being applied on the expense line - it may be a duplicate with price_include = True still set.

4. Check via Python shell (if you have access)

tax = env['account.tax'].search([('name', 'ilike', '12')]) 
for t in tax:
    print(t.name, t.price_include, t.price_include_override)

This will show all 12% tax records and their actual settings.

The most common culprit is a duplicate tax record being applied instead of the one you modified. Double check the tax linked directly on the expense product or expense category.

Hope this helps!