> ## 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).

# Where to upload forms not available on taxx.lu (e.g., form 152)?

If you need to upload a tax form not available on taxx.lu—such as Form 152 or Form 180—you can easily do so by using the “Attachments” section of your taxx.lu account. This section allows you to upload additional tax documents, forms, and supporting files to ensure your tax return is complete.