> ## Knowledge Base Index
> Fetch the complete knowledge base index at: https://help.taxx.lu/sitemap.xml
> Use this file to discover available pages before exploring further.
> Pure-Markdown content can be obtained by appending a '.md' suffix to the content URLs listed in the sitemap (without the trailing slash).

# Why is the S-Net section no longer displayed?

If the S-Net file is not imported at the beginning and you click on “Save and continue”, the corresponding section disappears. It is then no longer possible to return to it, which means a new tax return must be started.

It is therefore essential to import the S-Net file at the very beginning of the process, as once this step has been validated, it is no longer possible to go back.