I used the MyGuichet assistant to make my declaration and received a statement. Can you check that everything is correct?

Yes, absolutely!

When you use the MyGuichet assistant, your tax return is processed fully automatically. Their system generates a statement and a tax notice without any tax officials checking your information or the attachments.

⚠️ Important: The tax authorities reserve a period of 5 years to check your return at a later date. If any errors or omissions are detected, they may send you a new final statement, with adjustments (tax refund or supplement).

This means that if you have forgotten to make a deduction, filled in a box incorrectly or made a mistake, the first statement and tax notice will still be issued as it stands, without any human check.

If you have received this type of statement, we can check it for you with our Plus or Premium offer.

What do you need to do?

• Create a tax return on taxx.lu
• Deposit the statement you have received and all the tax documents for the year in question (salary certificates, certificates, interest statements, deductible expenses, etc.) in your account. Then contact our team to let us know that everything has been uploaded
• We analyse your complete situation and compare your tax return with what the administration has taken into account in the automatic tax assessment
• We clearly indicate if there are any errors, missed deductions or a potential refund. You will be informed by email or directly in your account

Updated on: 16/07/2025