# OSS & IOSS VAT Returns | EU Distance Selling

> The quarterly OSS return and the monthly IOSS one, built from posted invoices - VAT per member state and rate - with a distance-selling check.

- **What it is:** The quarterly OSS return and the monthly IOSS one, built from posted invoices - VAT per member state and rate - with a distance-selling check.
- **For:** Accounting
- **Odoo versions:** 16.0, 17.0, 18.0, 19.0, 20.0 - Community and Enterprise
- **Runs on:** Odoo.sh or Odoo you host yourself - not Odoo Online, which accepts no third-party apps
- **Price:** 199 EUR, one-time, on the Odoo Apps Store
- **Technical name:** bambooforge_oss
- **Not for:** This produces the return; it does not submit it. Every member state has its own portal and its own credentials.; The threshold is computed from invoices in this database. A company selling through a marketplace that files on its behalf has to net that off by hand.; One registration per company. Sellers registered in several member states under separate schemes need one company per registration.
- **Manual:** https://docs.bambooforge.dev/bambooforge_oss/
- **Live demo:** https://demo20.bambooforge.dev/odoo/action-bambooforge_oss.action_bf_oss_return
- **Store page:** https://apps.odoo.com/apps/modules/20.0/bambooforge_oss
- **Manual last updated:** 2026-09-21

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# OSS & IOSS VAT Returns | EU Distance Selling

## What this is for

`l10n_eu_oss` builds the taxes and fiscal positions that charge the right VAT
on distance sales into other member states. It does not produce the return —
the list of what was sold into each country at each rate — which is the thing
that has to be filed and paid.

## Preparing a return

*Accounting ▸ Reporting ▸ OSS / IOSS*

Pick the scheme and the period. The period follows the scheme: the Union scheme
is quarterly, IOSS is monthly, and choosing the wrong one is the most common
reason a return comes back. Setting a date inside a quarter snaps to that
quarter.

**Generate** builds one line per country of consumption and per rate, with the
taxable amount and the VAT. Credit notes net off inside the line rather than
appearing as a second one, which is how the return is meant to read.

**Export** writes a CSV with country, rate, taxable amount and VAT — the four
columns every national portal asks for, whatever shape it wraps them in.

## The threshold

Under 10,000 EUR of EU-wide distance sales in a year, a seller charges home VAT
and files nothing. Over it, VAT is due in the customer's country from the very
next sale. Companies usually discover they crossed the line when an auditor
tells them, which is a year of wrong VAT and a year of interest.

The figure is shown on every return: what has been sold to consumers in other
member states this year, and how much is left. Business customers with a VAT
number are excluded, because the threshold is about selling to consumers.

## Known limits

- This produces the return; it does not submit it. Every member state has its
  own portal and its own credentials.
- The threshold is computed from invoices in this database. A company selling
  through a marketplace that files on its behalf has to net that off by hand.
- One registration per company. Sellers registered in several member states
  under separate schemes need one company per registration.

## How we make sure it works

Before every release, **16 automated checks** run against this app on Odoo 16, 17, 18, 19 and 20.
Among them:

- An accountant without the checkbox reads no return.
- A filed return is not rewritten.
- Business customers do not count.
- Export before generating is refused.
- A refund nets off rather than adding a line.

The complete list is in the source you receive.

## Install

1. Copy `bambooforge_oss` into your addons path and update the app list, or install the ZIP from the Odoo Apps Store.
2. Install **OSS & IOSS VAT Returns**.
3. Open **OSS / IOSS**.

## Questions people ask

****Which Odoo versions does it run on?****

Odoo 16.0, 17.0, 18.0, 19.0, 20.0, on the series you buy it for; each series is its own listing.

****Community or Enterprise?****

Both. It needs no Enterprise app.

****What does it need?****

The standard Invoicing app. No extra Python package.

****Where does it show up?****

Under the **OSS / IOSS** menu.

****Does anything leave my server?****

No. It makes no call outside your Odoo server: no telemetry, no licence check, no third-party service.

****What happens if I uninstall it?****

Odoo drops the app's own tables and fields; the standard records it worked on (contacts, orders, products) stay as they are.