> ## 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).

# As a cross-border worker, can I use MyGuichet.lu?

Yes. Cross-border workers from **France, Belgium, and Germany** can use MyGuichet.lu to submit their Luxembourg tax return and other administrative documents, **provided they have a valid LuxTrust authentication method**.

Access to MyGuichet.lu, as well as the electronic signature and submission of documents, **strictly requires a secure LuxTrust login**, including for cross-border workers. Without LuxTrust, MyGuichet.lu cannot be used.