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Fields & identifiers

Tax number

The tax number is issued by the tax office and identifies the taxpayer nationally — it is not the same as the VAT identification number, and an invoice needs at least one of the two.

Also:
Steuer-Nr · BT-32 · taxId
Reviewed on 2026-08-26.

There is no long-form article for this term yet. The definition above is the complete entry; the related terms lead onwards.