Q: What is the deadline for sending in my tax return?

Tax return 2024 : <ul> <li>You have until 31 December 2025 to submit your tax return or annual statement. </li> </ul> **For previous tax returns : ** <ul> <li>It is no longer possible to submit them unless you are obliged to do so!</li> </ul> || If you are obliged to do so, you can still file your 2018, 2019, 2020, 2021, 2022 and 2023 returns on taxx.lu.

Q: Who has to make a tax return in Luxembourg?

A resident taxpayer is obliged to file a tax return when : <ul> <li>the taxable income of the household exceeds 100.000€ per year</li> <li>in case of cumulation, this refers to the simultaneous reception by a person or by spouses taxable collectively of several distinct remunerations (salaries and/or pensions) where the taxable income exceeds €36,000 for taxpayers in tax classes 1 and 2 and €30,000 for taxpayers in tax class 1a</li> <li>for non-Luxembourg residents, if you are taxed at a flat rate</li> </ul> Or if his Luxembourg taxable income is not subject to a withholding tax, as for example for: <ul> <li>a profit from the exercise of a liberal profession</li> <li>income from the rental of a property</li> <li>Salaried income paid by a foreign employer or pensions paid by foreign pension funds</li> <li>a taxable income which includes more than 1,500 euros of net income from movable capital liable to withholding tax</li> <li>a taxable income which includes more than 1,500 euros in directors' fees</li> <li>non-separated spouses, one of whom is a resident taxpayer and the other is a non-resident person, who had elected to be jointly taxed and had been provisionally classified as tax class 2 on their tax withholding slip</li> </ul> | Even if the tax return is not compulsory, it may be advantageous to do so in order to benefit from a tax refund. To find out whether or not you are entitled to a tax refund, simply do a free simulation on taxx.lu!

Question 1

How do I transfer my tax return to myguichet.lu? (Only F100 NOT for F163!)

Accepted Answer

A few clarifications before transfering your tax return to myguichet :

You will need a Luxtrust product to sign.
Do not modify the tax return or change the name of the document.
Please note! Form 163 (annual statement) cannot be send via myguichet.
You must also submit the PDF containing all your documents (attachments) as well as any additional forms (F190, F700, F152…etc).

| First go to the myguichet.lu website and click on "Log in". Then log in with your device and your login. Click on "New procedure".

| Then add the PDF of the Form 100 that you have downloaded from taxx.lu.

Add PDF

| Then click on “Add an attachment” to add the PDF of your attachments downloaded from taxx.lu.

| If you need to add any other forms (F190/210, F121, F700…etc) add them by clicking on “Add an annex”. Here's an example on how to do it : How do I submit form 190/210 to MyGuichet.lu?

Supporting document/annex

| Then click on "Sign" and follow the instructions

Question 2

How do I send my tax return in Luxembourg ?

Accepted Answer

||| Your tax return must be received by your tax office by 31 December at the latest. ||| Please note: only receipt of your tax return by the Tax Authorities is considered valid. The postmark date is not accepted as proof of timely filing.

You must send either form 100 OR form 163, not both!

Which form should I send between 100 and 163?

Form 100 :

Two possibilities:

1) Submit the form and attachments on MyGuichet.lu. Log in to your myguichet.lu account and submit your tax return and attachments.

How do I transfer my tax return to myguichet.lu? (ONLY form 100)

2) Send the form and enclosures by post to your tax office. Print the PDF and sign the last page after checking the data. The address of the tax office is on the first page, top left.

Form 163 :

Only one option:

Send the form and attachments by post to your RTS office.

Print out the PDF and sign on the last page after checking the data. The address of the RTS office is on the first page, top left.

Question 3

What is the deadline for sending in my tax return?

Accepted Answer

Tax return 2024 :

You have until 31 December 2025 to submit your tax return or annual statement.

**For previous tax returns : **

It is no longer possible to submit them unless you are obliged to do so!

|| If you are obliged to do so, you can still file your 2018, 2019, 2020, 2021, 2022 and 2023 returns on taxx.lu.

Question 4

Who has to make a tax return in Luxembourg?

Accepted Answer

A resident taxpayer is obliged to file a tax return when :

the taxable income of the household exceeds 100.000€ per year
in case of cumulation, this refers to the simultaneous reception by a person or by spouses taxable collectively of several distinct remunerations (salaries and/or pensions) where the taxable income exceeds €36,000 for taxpayers in tax classes 1 and 2 and €30,000 for taxpayers in tax class 1a
for non-Luxembourg residents, if you are taxed at a flat rate

Or if his Luxembourg taxable income is not subject to a withholding tax, as for example for:

a profit from the exercise of a liberal profession
income from the rental of a property
Salaried income paid by a foreign employer or pensions paid by foreign pension funds
a taxable income which includes more than 1,500 euros of net income from movable capital liable to withholding tax
a taxable income which includes more than 1,500 euros in directors' fees
non-separated spouses, one of whom is a resident taxpayer and the other is a non-resident person, who had elected to be jointly taxed and had been provisionally classified as tax class 2 on their tax withholding slip

| Even if the tax return is not compulsory, it may be advantageous to do so in order to benefit from a tax refund. To find out whether or not you are entitled to a tax refund, simply do a free simulation on taxx.lu!

Question 5

Which are the tax deductible insurances?

Accepted Answer

Here are some deductible insurances (foreign insurances are also deductible! ):

Accident insurance
Life insurance
Home insurance (third-party liability only)
Car insurance (third-party liability and protected driver only!)
Supplementary health insurance (DKV, CMCM…)
Disability/old age/incapacity insurance
Outstanding balance insurance (single premium and annual premium)

Question 6

What do I do if I have forgotten my password?

Accepted Answer

Go to the homepage and click on "Login" or "Do you have an account? Login now!" A new page opens and you will find at the bottom the function "Forgot your password ?"

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