Other official information and services:
Biztax - Starting a new return
Sign in to Biztax
Identify yourself via your identity card, via itsme® or via a class 3 certificate
Click on “Mes déclarations”
Enter the assessment year
Enter the type of return IPM (income tax on legal entities) (ASBL - nonprofit association), ISoc (corporate income tax) or INR/SOC (non-resident income tax for companies)
You must not complete any other field!
Click on “Chercher déclarations”
Click on "Créer une autre déclaration"
Enter your enterprise number
Enter the start/end date of the taxable period
For the ASBL (nonprofit associations) the period concerned by the return is always set from January 1st to December 31st
Enter the type of return
Click on “Créer"
Your return is displayed on the screen
You can change the information sheet
(only if it is necessary)
You can enter the data of the return by clicking on 276.5.A (for the IPM - income tax on legal entities)
To add enclosures, click on “276.5.B”
When you have finished filling in your return, click on “Liste des erreurs”.
Click on "Démarrer la vérification d'erreurs"
This procedure must be carried out after each change you might bring to the return
Click on "Souscrire"
Cick the box "I confirm that the information provided in this declaration is accurate and true".
Click on "Submit".
You will find
here the detailed procedure
My eGov role management
Register in "sécurité sociale"
Check eID authentication
Certificates eID check
Check an entreprise number in BCE
Contact SPF Finances