Manuals
Submitting a return step by step 2023 (PDF, 2.65 MB) (in French)
Identifying via itsme (PDF, 356.25 KB) (in French)
How to use Biztax electronic mandates (PDF, 1.33 MB) (in French)
Creating the return of a company dissolved without liquidation (mergers and split-ups) (PDF, 171.48 KB) (in French)
Acknowledgement of receipt: what to do when receiving the message “Validity of the document certification unknown. Impossible to identify the author” with a yellow question mark? (PDF, 381.13 KB) (in French)
Compulsory configuration of your MAC when using Biztax (PDF, 345.7 KB) (in French)
FAQ
Tax information
Tax Shelter approved audiovisual works and Tax Shelter approved scenic works - Rates of corporate income tax and non-resident income tax as regards the companies on previously exempted profits (PDF, 97.41 KB) (in French)
Income tax on legal entities assessment year 2021 - Deductible costs of a building located in Belgium (PDF, 96.58 KB) (in French)