This is the most important idea in the course, so it gets its own lesson.

Odoone never reads a tax rate to decide which box a figure belongs in. It reads the tax tags carried by the UAE taxes in your chart of accounts. VAT Box Mapping is the table that says which tags feed which box; Emirate Mapping says which Emirate feeds which of boxes 1a to 1g.

Why this matters practically:

• If you create a new tax and forget its tags, its amounts will not appear in the return. They will not be wrong — they will be absent, which is harder to notice.
• If you change a rate, the mapping still holds. The report follows your actual tax setup rather than a hard-coded assumption about what 5% means.
• Two taxes can both read 0% and belong in different boxes.

The 0% EX versus 0% EXT trap. The UAE localisation ships two zero-percent taxes:

Both show 0% VAT. They land in different boxes and mean different things to the FTA. Choose by supply type, never by the "0%". This same distinction reappears in the FTA Audit File — a separate module, covered in course 2.3 — as codes ZR and EX. Get it right once, here, and it is right everywhere.