As long as you remain active in the application, you will of course remain logged in. If you do not work in the application for a longer period of time (after about 15 minutes), you will be logged out via a time-out (the application will however remain open).

If you have not received an acknowledgement of receipt, your return has not been submitted.

If you have any doubts, you can check the status of your return via “My returns” > “Search return”.

If the declaration does not have the status “filed”, it has not yet been submitted.

If the declaration has been received by the Administration, you can download the acknowledgement of receipt via “Documents of the return”. The original acknowledgement of receipt in PDF format is the only valid proof of submission.

You must file a corporate income tax, non-resident income tax/companies as well as an income tax on legal entities return online (Biztax return).

If the provision of service (i.e. the website or parts thereof) is not available, the FPS Finance cannot be held responsible for the consequences of such an interruption.

The FPS Finance reserves the right to interrupt the service for any reason whatsoever, without having to justify itself, and it cannot be held liable for the consequences of this interruption.

An interruption of the provision of service shall in no way release you from the obligation to file the tax return within the time limit set for this purpose.

The FPS Finance reserves the right to make changes to the information, presentation and provision of service offered on the Biztax website.

It may do so without prior notice and without being liable for any consequences.

Biztax shall make every effort to communicate changes in advance.