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Your Belgian corporate income tax return, out of your own books

Anthracite Biztax turns your Odoo accounting into the corporate income tax return (CIT), as a file you import into Biztax as it is.

Two ways to get it: the service works wherever your Odoo is hosted; the module needs an Odoo you host yourself, or odoo.sh.

The service

we hand you a ready Odoo

Works everywhere

We read your books remotely; you prepare and you file.

The module

you run it yourself

On odoo.sh or your own server

You install it, you run it; nothing leaves your database.

Where it works
Odoo Online (odoo.com)yesno — the platform installs no custom code
odoo.shyesyes
your own serveryesyes
What you hand overA read-only key you create yourself. Your source accounting is never modified: it is only read, to duplicate its contents into the database we hand youNothing. It runs offline: no activation key, no call home, no expiry
What you getAn Odoo 19 Community database, hosted by us, fed with your accounting, module ready to use, downloadable at any time. Your annual-accounts XBRL file for the National Bank is included, at no extra chargeThe module, full Python source code, OPL-1 licence. Odoo 19, assessment year 2026
What it costsFrom 79 € excl. VAT for a single company, per company and per financial year, plus the takeover you choose — the takeover of your entries, the whole history, is free. Accounting firms and fiduciaries: from 25 € per file with a pack of files — see the packs.999 € excl. VAT, one-off, licence for one legal entity: yours
To startThe diagnosis is free, it reads totals only, and it commits you to nothingBuy it, then install it in your Odoo
What goes into the corporate income tax return — the same engine either way

  • Reserves broken down per box, disallowed expenses account by account
  • 275U statement classified entry by entry, liquidation reserve, 270 MLH rents annex, embedded PDF annexes
  • The whole tax cascade, basket included
  • The official calculation rules are checked before the file is produced
  • Three validation reports: an HTML where each line opens on its calculation, a PDF and an XLSX
  • The attached PDFs are re-extracted from the .biztax file itself, not copied from the source. You review what actually goes out, not what we claim to have put in
Start — analyse my database What it costs How the service works, and what we can read Buy the module Odoo Apps Store

Multi-company groups: ask for a quote.

What it does not do

  • On Biztax, a return that passes validation is submitted automatically. There is no intermediate step and there is no going back. Re-read the three validation reports before loading the file
  • It is built for assessment year 2026 only, and says so
  • We file nothing for you, on either route. It produces a file; loading it onto Biztax is up to you
  • What cannot be read from the books (workforce, benefits in kind…) is entered by you, in a tab made for it
  • We do not draw up your annual accounts and we do not audit your accounting. Drawing them up is reserved to ITAA professionals

And in every case: it does not check your accounts. If a figure is wrong in your books, it is wrong in the file. An accounting review remains essential before filing anything.

See it running before you connect anything

A demo Odoo, with a full set of books and this module installed, is open to everyone: sign in with demo / demo. You can change anything in it: the database is reset every night at midnight.

Open the demo A question? Back