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You have received a Tax Declaration Letter

Posted by admin on 20/06/2022

What to do when you have received a tax declaration letter from Belgium during or after your stay.

Everyone who is registered in the Belgian registers is considered to be a Belgian tax resident and has to file an annual income tax return in the following year.

You have to do this, even if you haven’t had any taxable income in Belgium in the income year or if your income was well below the taxable amount.

You can find more information on “how to fill in your tax form” on

What should you do now ? Do you have to react to this tax letter ? 

–          Yes, you should react, to avoid possible fines. 

–          You can call the telephone number which you find below the letter but it is better to send an email. If you have lived in or near Leuven you should send an email to

–          Don’t forget to mention your ‘nationaal nummer’ (which you find in the tax letter, this is your Belgian national registration number)  or to attach the tax letter to your email.

–          In your email you explain that you have only been staying in Belgium for a short period, from …… until …………………. as an Erasmus exchange student at KU Leuven, that you have not received a Belgian tax form since you had already left Belgium and that you are not able to collect a tax form or do the tax declaration on line since you are abroad. 

–          If you have had no taxable income in Belgium in 2021,  you have to explicitly state this in your email.  

–          If you have had a taxable income in Belgium in 2021, you have to declare this income and attach the proof (for example the attestation 281.10 if you have worked with a student employment contract). 

Save your email conversation for future reference.

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