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# Where can I find my Belgian tax identification number (TIN)?

The tax number can be found on the following documents:
* On the back of your Belgian identity card
* On the back of your Belgian social security card
* On the back of your residence permit and vehicle registration certificate for foreigners residing in Belgium

![](https://storage.crisp.chat/users/helpdesk/website/1c5fc819171ffd00/exemple-1belgiquedrqed0_1soqdsr.png)