> ## 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).

# What happens if I try to use my Google account with an email that already exists on taxx.lu?

If you attempt to sign up via your Google account with an email address already associated with an existing taxx.lu account, the system will ask you to sign in with your usual password.
You'll get the following error message: 
![](https://storage.crisp.chat/users/helpdesk/website/-/1/c/5/f/1c5fc819171ffd00/screenshot-2025-09-15-at-14093_7pqnyr.png)

You cannot link the Google login to an existing account.