> ## 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 should I do if the result on taxx.lu differs from the tax statement received by Tax Authorities?

If you have chosen our "Plus" or "Premium" packages, our services include verification of your tax assessment. To do this, please contact us by e-mail at help@taxx.lu and send us your tax statement in full.

If you have chosen our "Standard" package, you have the option of upgrading to the "Plus" package so that our team can carry out a full verification of your tax return and tax assessment. 


[What does the tax authority's tax statement look like?](/en/article/what-does-the-tax-authoritys-tax-statement-look-like-94juhk/)