Tax identification number (TIN) is a unique identifying number, issued upon registration with the tax authority in the country where the individual is a taxpayer.
The tax identification number remains permanently valid and doesn’t change in any event, including a relocation, a change of name, or a change of civil status.
Each country may have a different term for TIN.
You can find your tax identification number for the following countries in the links below:
For other countries, the tax identification number might be found in tax documents or on your country's tax administration portal. Further information on tax identification numbers in the European Union can be found here.