How can I check why my tax result changed?

If your tax result is different from the previous year

• Compare your taxable income on Form 100 for each year (page 20)
• Review any changes in deductions or tax credits
• Check the tax advances entered in your taxx.lu account

By reviewing these factors, you can often pinpoint the reason for changes in your tax liability or tax refund.

Updated on: 21/01/2026